SUSPENDED SCAFFOLDING & RIGGING SOLUTIONS
FALL PROTECTION
Glossary of Powered Access & Safety Terms MATERIAL HOISTING
WIND ACCESS Accessories: those components which, Ascending: a suspended scaffold moving Brace: a rigid connection that holds one when added to scaffolding or shoring, upward, or climbing scaffold member in a fixed position with SERVICE enhance their utility or usefulness respect to another member, or to a building EXPERTISE Authorized person: a person approved or or structure Accessway: a system which provides assigned by the employer to perform a FORMS, access of personnel to and from scaffold specific type of duty or to be at a specific Brake, primary: a brake used to stop a APPLICATIONS platforms location on the jobsite hoist and its load under normal operating & DOCUMENTS conditions Adjustable suspension scaffold: a Base: the relevant points at which a APPENDIX suspension scaffold equipped with a structure makes contact with its support Brake, secondary: a brake designed to hoist(s) that can be operated by an prevent the descent of the suspended or employee(s) on the scaffold Base plate: a device used to distribute leg supported equipment in the event of an or post load over a larger area overspeed condition Allowable load: see Load, Allowable Beam: a narrow horizontal structural Breech: the opening between the sheave GLOSSARY Alternating current (AC): a current which load-bearing member and the inside of a block OF POWERED reverses in regularly recurring intervals ACCESS & of time and which has alternative positive Beam clamp (scaffold): a device used to Breech reeving: in suspended access SAFETY TERMS and negative values, and occurring a fasten a scaffold member to a beam flange describes the process of placing a specified number of times per second suspension wire rope into a device using CONVERSION (See Frequency) Beam clamp (shoring/suspended): a other than the bitter end to insert the rope TABLE device used to fasten two I-beam members into the device. Generally saves time. American National Standards Institute at their flanges when one I-beam is resting ALPHABETICAL (ANSI): an organization which develops across the other I-beam flange Buckle: any device for holding the body PRODUCT INDEX standard safety specifications and belt or body harness closed around the procedures for a wide range of industrial Birdcage (suspended scaffolds): a kink worker’s body PART NUMBER equipment, including ladders and scaffold. pulled through or displacement of outer PRODUCT INDEX Many OSHA regulations are based on these wire rope strands forced into compression Building face roller: a suspended scaffold standards. Also known as ANSI forming a cage platform guide roller designed to contact the outer face or wall structure of a building Ampere (Amp): the unit of electric current Boatswain’s chair: see Bosun’s chair flow. One ampere will flow when one volt Building maintenance: operations such as is applied across a resistance of one ohm. Boatswain’s stand: see Bosun’s stand window cleaning, caulking, metal polishing, reglazing and general maintenance on Anchor: a device used to secure any item Body belt (safety belt): a strap with building surfaces of scaffold to a rigid point means both for securing it about the waist and for attaching it to a lanyard, Cable: a conductor or group of conductors Anchorage: a secure means of attachment lifeline or deceleration device; not enclosed in a weatherproof sheath, that to which the personal fall arrest system is acceptable as a fall arrest device may be used to supply electrical power connected and/or control current for equipment or to Body harness: a design of straps which provide voice communication circuits Anchored track: galvanized steel I-beams may be secured about the employee in a anchored to the building structure in manner to distribute the fall arrest forces Cable restraint: flexible wire mesh parallel to enable a roof machine to over at least the thighs, pelvis, waist, chest gripping device designed so that the more traverse horizontally along the rooftop and shoulders, with means for attaching you pull, the more it grips; used with swing it to other components of a personal fall stages to support the weight of the cable Anemometer: an instrument for measuring arrest system and to relieve stress upon the electrical wind velocity wiring devices Bosun’s chair: a suspended seat designed Angulated roping: a method of stage to accommodate one worker in a sitting Cage: see Scaffold, Single-point suspension in which the upper wire rope position adjustable suspension sheaves or suspension points are closer to the plane of the building face than the Bosun’s stand: a suspended stand Cantilever: the portion of a structural corresponding attachment points on the designed to accommodate one worker in a member which projects beyond its support stage, thus causing the platform to press standing position against the face of the building during its Capacitance: the property of a circuit or vertical travel Bowline: a knot used for rigging bosun’s body that permits it to store an electrical chairs, tying off to supports, making a loop charge equal to the accumulated charge ANSI: see American National Standards for other lines to run through divided by the voltage. Capacitance is Institute expressed in farads. Bowline on a bight: a variation of the Approved: accepted by the authority having bowline knot, tied in a bight of a rope; it Carabiner: a connector component jurisdiction gives two non-slipping loops generally comprised of a trapezoidal or oval shaped body with a normally closed gate or Arresting force: the force, generated by similar arrangement which may be opened arresting the test weight, that is transmitted to permit the body to receive an object through the fall arrest system components and, when released, automatically closes to to the anchorage retain the object
Spider® | www.spiderstaging.com | [email protected] | phone: 1-877-774-3370 255 APPENDIX 256 component ofthesystem. together. Itmaybe anindependent system andpositioningdevicesystems (connect) partsofthepersonalfall arrest Connector: can beplacedwithinitsintendedlimits Configuration: for thepassageofelectricalcurrent Conductor: to eliminatesuchhazards authority totakepromptcorrectivemeasures dangerous toemployeesandwhohasthe conditions thatareunsanitary, hazardousor hazards inthesurroundingsorworking capable ofidentifyingexistingandpredictable 1926.450(b) and1926.32(f)onewhois Competent person: furnished byanelectricpowerutility Commercial power: conductors shielded copperwiresforuseaselectrical steel wiresforsupportoftheequipmentand Combination cables: widths fromwhichaloadissuspended that clampsoverstructuralparapetsofvarying Clamp, parapet: used asameansofcontainment Cladding: protection. interrupting capacity(AIC)forshortcircuit protection andamaximummagneticampere an amperetripratingfornormaloverload those ofshortcircuit. Circuit breakershave specified abnormalcircuit conditions,suchas and automaticallybreakingcurrentsunder foraspecifictime, Also making,carrying breaking currentsundernormalconditions. and device capableofmaking,carrying, Circuit breaker: electric currentmayflow Circuit: engineer or inspectionbyaregisteredprofessional Certified: requirement ofa statement confirmingtheperformance Certification: a casterdoesnothavetocontainswivel tower formanualmovementofthescaffold; which isattachedtothebaseofascaffold lock, aswivelornon-swivellockboth, Caster: movement andsupportofaworkplatform Carriage: (Continued) of PoweredAccess&SafetyTermsGlossary a pivotingwheel,containingwheel a completeorpartialpathoverwhich acceptedbydesign,evaluation Spider windorweatherenclosurematerial a mobileassemblyusedforthe adevicewhichisusedtocouple awire,cable,orbusbardesigned awritten,signedanddated allshapesinwhichascaffold ® amechanicalswitching anadjustableriggingdevice | www.spiderstaging.com asdefinedinOSHA the termappliedtopower wireropeshavingboth
sells, rents and services equipment sells, rentsandservices manufacturer ordistributorandwho generally Dealer: concrete tobeplaced stringers, joists,reinforcing rodsandthe Dead load(shoring): accessories scaffold structure,includingplatformand Dead load(scaffold): suspended scaffolds Davit: 60 cycle(60Hz). Current Cycle: degree incrementsforasegmentedcurve Current (I): CSA: joined attheircentertoformanX Crossbrace: tubes ofatubeandcouplerscaffold Coupler: counterbalance aload Continuous stabilizationbuttons: length ofthebuildingfaçade vertical traveloftheplatformalongfull and providesworkplatformstabilizationfor positively engagesthebuildingtie-inguides suspended unit(suspendedscaffold)that Curved track: Curved a circuit, measuredinamperes Counterweight: cornice ofabuilding. device tosecureasuspensioncableunder handle theforces exertedbypoint-loadingthe Cornice hook: speed allows aworkertodescendatcontrolled Controlled descentdevice: retardation ofmovingmembers stopping, direction,acceleration,speedand Control: floor slide overbuttonsthatareplacedatevery shape attachedtoeachendoftheplatformthat Continuous stabilization: electrical switchingdevices electrical circuits, whichareapartofall Contacts: interrupt anelectricalpowercircuit. or remoteoperationtorepeatedlyestablish operated byanelectriccoil;itallowsautomatic Contactor: CanadianStandardsAssociation amemberusedforsupportof a givenlengthoftime(see apersonorentitywhobuysfrom a ). IntheU.S.,mostelectriccurrentis adeviceforlockingtogetherthe a systemgoverningstarting, devicesformakingandbreaking anelectro-mechanicaldevice theamountofelectricityflowingin twodiagonalscaffoldmembers ahookdesignedexpresslyto fabricated intoaradiusorcutin weightorweightsusedto | phone:1-877-774-3370 theweightofforms, theweightof theportionofa adevicewhich channel Alternating Direct current(DC): downward Descending: employee comestoafullstop the locationofthatattachmentpointafter of thedecelerationdeviceduringafall,and activation (attheonsetoffallarrestforces) harness attachmentpointatthemomentof location ofanemployee’s bodybeltor is measuredasthedistancebetween deceleration devicebeginstooperate.It stopping, fromthepointatwhich lifeline elongationandfreefalldistance,before distance afallingemployeetravels,excluding Deceleration distance: Deceleration device: bin below direct theflowofwastematerialtoacollection Debris chute: Energy absorber: or itsextensions across theendofascaffoldplatform End guardrail: of normalpowersource stand-by electricpoweruponfailureoroutage sourcereserve ofelectricpowerthatprovides Emergency (stand-by)power: the verticalplane Elevation (drafting): to sealeveloranotherpoint Elevation: of theearth inplace another conductingbodythatserves between anelectricaldeviceandtheearthor Electrical ground: Dynamic load: Duty rating: Dropline: two non-slippingloops tied inadoublesectionofrope;thisknotgives Double bowline: equipment power tools,worklights,andotherelectrical 240V single-phasepowersource foroperating multiple poweroutletsfroma208V3-phaseor Distribution panel: functions oftheworkplatform initiatethepowered drive orotherwise toraise,lower,necessary rotate,telescope, Directional controls: in onedirection see anestablishedelevationinrelation see asuspendedscaffoldmoving anenclosedconveyanceto Lifeline aguardrailplaced see Load avariationofbowlineknot, see aconductingconnection adevicethatprovides Load, Dynamic an electriccurrentflowing all primary controls allprimary a viewofstructurein see Shock absorber theadditionalvertical Shock absorber anindependent
SUSPENDED SCAFFOLDING & RIGGING SOLUTIONS
FALL PROTECTION
MATERIAL HOISTING
WIND ACCESS Equivalent: an alternative design or Free fall: the act of falling before a Ground fault circuit interrupter (GFCI): a features that will provide an equal personal fall arrest system begins to receptacle with a built in circuit that will SERVICE factor of safety apply force to arrest the fall detect leakage current to ground on the EXPERTISE load side of the device. When the GFCI Exposed sides and ends: see Open sides Free fall distance: the vertical detects leakage current to ground, it will FORMS, and ends displacement of the fall arrest attachment interrupt power to the load side of the APPLICATIONS point on the employee’s body belt or body device, preventing a hazardous ground fault & DOCUMENTS Eye or Eye splice: a loop in a rope around harness between onset of the fall and just condition. GFCI receptacles must conform a formed thimble made by fastening the before the system begins to apply force to UL Standard 943 Class A requirements, APPENDIX end of the rope back onto itself to arrest the fall; this distance excludes and their use is required by the National deceleration distance and lifeline/lanyard Electric Code NFPA-70 in a variety of indoor Fabricated platform (2-person): fabricated elongation, but includes any deceleration and outdoor locations. platform unit used to support two workers device slide distance or self-retracting and limited material; these platforms lifeline/lanyard extension before they Ground rigged davit: a davit which cannot are usually used with trestles, extension operate and fall arrest forces occur. be used to raise a suspended working GLOSSARY trestles, platforms, step-ladders or they platform above the building face being OF POWERED can be used with stirrups as part of a Freely laid track: galvanized steel I-beams serviced ACCESS & suspended scaffold, provided they are a resting on the rooftop and separated from SAFETY TERMS minimum of 20 in. (508 mm) wide the roof membrane by layers of protective Ground rigging: a method of assembling a support material and not anchored to the suspended platform while it is positioned at CONVERSION Fabricated platform (3-person): fabricated building structure ground level or on another safe horizontal TABLE platform unit used to support three workers surface and limited material; these platforms are Frequency: the number of complete cycles ALPHABETICAL usually used with stirrups as part of a of an alternating voltage or current per unit Grounded neutral: the common neutral PRODUCT INDEX suspended scaffold or as a scaffold runner of time, usually expressed in cycles per conductor of an electrical system, which board second or Hertz (Hz) is intentionally connected to ground to PART NUMBER provide a current carrying path for the line PRODUCT INDEX Façade: face or frontage, typically of a Full load current (Amps): the greatest to neutral load devices building current that a motor or other device is designed to carry under specific conditions: Grounding conductor: the conductor that Factor of safety: the ratio of ultimate when rated voltage is applied at rated is used to establish a ground and that load to the allowable load frequency with rated horsepower. Any connects equipment, a device, a wiring additional current is an overload. system, or another conductor (usually Failure: the condition at which a the neutral conductor) with the grounding component or assembly can no longer Fuse: an over-current protective device electrode support the load (load refusal) that consists of a conductor that melts and breaks when current exceeds rated Guardrail: horizontal members of a Fairlead: a guide for wire rope value beyond a predetermined time guardrail system Fairlead roller: a roller device to allow a Generator: a machine that converts Guardrail post: the vertical support used in minor change in direction of travel of a mechanical energy into electrical a guardrail system rope under tension energy/power Guardrail system: members erected in a Fall arrest devices: physical components Generator receptacle: a contact device vertical plane to restrict users from falling used to stop a falling worker; these installed for the connection of a plug and from a work platform; may consist of components include but are not limited flexible cord to supply emergency power posts, toprails and midrails to nets, body harnesses, lanyards, from a portable generator or other alternate lifelines, etc. source of power. Receptacles are rated in Guide button: a building face anchor voltage, amps, number of wires, and by designed to engage a guide track mounted Fall prevention devices: physical enclosure type. on a platform components used to prevent a worker from falling off an elevated surface; these include Grade: the ground, floor, sidewalk, roof or Guide roller: a rotating cylindrical member, but are not limited to guardrails, screens, any other approximately level solid surface operating separately or as part of a body belts, body harnesses, tethers, etc. of sufficient area and having sufficient guide assembly to provide continuous structural strength to be considered as a engagement between the suspended or Fist grip: a trade name; see Twin base clip safe place to work supported equipment and the building guides or guideways Fixed davit: a davit designed to remain Ground: a connection, either intentional or at a fixed location accidental, between an electric circuit and H-beam: steel beam with wider flanges the earth or some conducting body serving than an I-beam Flanges: the parallel flat portions that in place of the earth describe the cross-sectional shape of Hairpin: a reusable formed wire loop used structural members such as I-beams, G.F.I. (Ground Fault Interrupter): a device to keep a rivet or pin in place channels or T-beams which automatically disconnects electrical current in the event of a short in the circuit Hertz (Hz): a unit of frequency equal to one Float scaffold: see Scaffold, Float cycle per second Four point scaffold: see Scaffold, Mason’s adjustable
Spider® | www.spiderstaging.com | [email protected] | phone: 1-877-774-3370 257 APPENDIX 258 directly supportsheathing Joists: in closeproximitytothesuspension ropes anchors andwhicharelocatedin verticalrows secured topermanentlyinstalled building whereby ascaffold’s suspensionropesare Intermittent tie-ins: spaced buildinganchors suspension wirerope(s)issecuredtoregularly platform stabilizationinwhichtheangulated Intermittent stabilization: sequence operations ormotionsoccurinproper Interlock: position foruse Installation: device canbeconnected masonry, concreteorrocktowhichananchor Insert: circuit force (voltage)inthatcircuit oraneighboring current inacircuit inducesanelectromotive magnetic fieldandbecauseofwhichavarying that causesittostoreenergyintheformofa Inductance: the sameasresistance(ohms). the lowercurrent.Theunitofmeasureis flow ofelectricity. Thehighertheimpedance, circuit thatdeterminesitshindrancetothe Impedance: horizontal movementofasuspendedscaffold rigging toanoverheadsteelbeamallow I-beam roller: scaffold riggingtoanoverheadsteelbeam I-beam clamp: horsepower is745.6watts. minute. Theelectricalequivalentofone required tolift33,000lb,onefoot,in Horsepower (HP): which aloadisattached Hook: walking/working surface its leastdimension,inafloor, rooforother Hole: Hoist standard: maximum allowableoperatingload Hoist ratedload: material and pulleycanbesuspendedforhoistinglight Hoist arm: lower asuspendedscaffold Hoist: (Continued) of PoweredAccess&SafetyTermsGlossary agaporvoid2in.(51mm)morein aj-shapedpieceofmetalonblock,to amechanicaldevicetoraiseand athreadedconnectorembeddedinto horizontalstructuralmemberswhich Spider a devicedesignedtoensurethat averticaluprightonwhichrope asystemofscaffoldplacedin the propertyofanelectriccircuit a characteristicofanelectric adeviceusedtosecurescaffold adeviceusedtosecure ® see | thehoistmanufacturer’s www.spiderstaging.com theamountofenergy Hoist arm a meansofstabilization amethodof
a product instructions onhow tooperateand/ormaintain Manual: water andequipment runways, excavations,pits,tanks, materials, limited togroundlevels,floors,roofs, ramps, can fall;suchareasincludebutare not employee islocatedandtowhich anemployee Lower levels: Load platform Live load: an electricaldisengagement which stopsmovementofaplatformthrough Limit switch: personal fallarrestsystemtotheanchorage means forconnectingothercomponentsofa asa (horizontal lifeline),andwhichserves anchorage atbothendstostretchhorizontally (vertical lifeline),orforconnectionto anchorage atoneendtohangvertically Lifeline: absorber, anchorageconnectoror the bodysupporttoafallarrester, energy has aconnectorateachendforconnecting line ofrope,wireropeorstrapwhichgenerally Lanyard: stairs Landing: tread ladderintheformofstairs supporting ladderconsistingofawideflat Ladder stand: units ofelectricalpoweraremeasured. power, equalto1000watts.Usedwherelarger Kilowatt (kW): a transformer power beforebeingused,suchastheratingof Kilovolt-Amperes (kVA): failure occurs loads supportedbythewirerope intended load during movement,etc. on theplatform,brakeengagement of thescaffold,windmovementloads a scaffoldstructure,causedbymovement by anappropriatefactorofsafety determined bydividingtheultimateload load limitatwhichtheitemistobeused; Working load: Ultimate load: Total (suspended) Maximum intended: Dynamic: Allowable: aflexiblelineforconnectiontoan acomponentconsistingofflexible aplatformattheendofflight a bookorpamphletcontainingwritten workersandmaterialsonthe areasbelowthelevelwhere an electricalsensingdevice amobile,fixed-size,self- anadditionalloadimposedon a unitofmeasureelectrical (Alsocalled | phone:1-877-774-3370 see the loadatwhich : thesumofall Load, Allowable aratingofapparent see Rated Load Maximum
) the
grounded neutral. entranceonlyandbecomesthe point ofservice neutral inmostsystemsisgrounded atornear return conductorinasinglephasecircuit. The polyphase circuit, conductortothatpoint,or Neutral: manufacturers andusersofelectricalproducts. standards tofacilitateunderstandingbetween apparatus andsupplies.NEMApromulgates supported bythemanufacturersofelectrical Association, anon-profittradeassociation NEMA: Protection Association as recommendedbytheNationalFire forelectricwiringandapparatus, Underwriters the standardofNationalBoardFire NEC: ofthedrumhoist surface rope inmorethanonesuccessivelayeronthe machine thataccumulatesthesuspensionwire Multiple wrapdrumhoist: Midrail: thickness onehumanhair) one millionthofameter, aboutoneeighththe particulates intheairstream(onemicron= Microns: work, exceptwheelbarrowsandmopcarts propelled wheeledequipmentusedforroofing Mechanical equipment: scaffold componentatanyonetime anticipated tobeappliedascaffoldor transmitted loads,andotherloadsreasonably of allpersons,equipment,tools,materials, Maximum intendedload: adjustable suspension scaffold: Mason’s adjustablemultiple-point builds orproducesaproduct Manufacturer: Scaffold, Multi-pointsuspended Multiple-point suspendedscaffold: Multi-level suspended Multi-level suspendedscaffold: on topofanother wire ropesthatlayonadrumhoistone Multi-layered drumhoist: association witharoofcar Mobile davit: guardrail system midway betweenthetoprailandplatformofa theNationalElectricalCode,whichis NationalElectricalManufacturers ahorizontalmemberapproximately thepointcommontoallphasesofa measurementusedtodefine adavitdesignedtobeusedin apersonorentitywhomakes, see allmotororhuman Scaffold, Mason’s suspension the totalload atypeofhoisting see see Scaffold,
SUSPENDED SCAFFOLDING & RIGGING SOLUTIONS
FALL PROTECTION
MATERIAL HOISTING
WIND ACCESS Occupational Safety and Health Act: a Overload device: an electro-mechanical Platform stabilization: means of United States Federal Law that regulates device in a drum or traction hoist that stabilization of the platform to the façade SERVICE safe work practices affecting employees; senses an overloading condition and (continuous or intermittent) to prevent the EXPERTISE also known as OSHA. See OSHA.gov for arrests upward travel until the overloading platform from being blown away from the more information is resolved façade during windy conditions FORMS, APPLICATIONS Ohm: unit of electrical resistance. One volt Overload protection: See Thermal Platform unit: a general term for individual & DOCUMENTS will cause a current of one ampere to flow overload protection. components (planks, scaffold decks or through a resistance of one ohm. fabricated platforms) that comprise the APPENDIX Owner: a person or entity who has platform of a scaffold; platform units can Ohm’s Law: the rate of the flow of the possession of a product by virtue of either stand alone or be used in conjunction current is equal to the electromotive force proof of purchase with one another to form a platform divided by the resistance. The three basic Ohm’s law formulas are: Parallel circuit: an electrical circuit that Plumb: vertical or the act of making vertical has more than one path though which GLOSSARY Amperes = Volts ÷ Ohms electrons may flow Polypropylene: a type of synthetic material OF POWERED Ohms = Volts ÷ Amperes ACCESS & Volts = Amperes x Ohms Parapet: that part of a wall that extends Positioning device system: a body belt or SAFETY TERMS above the roof level which may or may not body harness system rigged to allow an Open sides and ends: the edges of a be structural employee to be supported on an elevated CONVERSION scaffold platform that exceed the maximum vertical surface, such as a wall, and work TABLE allowable horizontal distance away from a Parapet clamp: see Clamp, parapet with both hands free while leaning sturdy, continuous vertical surface (such ALPHABETICAL as a building wall) or a sturdy, continuous Particulates: any solid material, such as Power operated hoist: a hoist which is PRODUCT INDEX surface (such as a floor); this is normally a dirt, rust, weld fines, pollen, etc., that is in powered by other than human energy distance of 14 to 18 in. (356 to 457 mm), the air stream PART NUMBER but may be greater or lesser depending Primary brake: see Brake, primary PRODUCT INDEX upon the type of work to be performed Pedestal: support for I-Beam track on the platform and the particular safety fabricated from steel or concrete Professional engineer: a person registered standard under which the work is being or licensed to practice engineering under performed Personal fall arrest system (PFAS): an state or provincial jurisdiction assembly of components, subsystems and Opening: a gap or void 30 inches (760 anchorage used to arrest a person in a fall PSI: pounds per square inch (unit for mm) or more high and 18 inches (480 mm) from a working height pressure of compressed air) or more wide, in a wall or partition through which employees can fall to a lower level Pin and sleeve: a receptacle with Qualified person: one who, by possession cylindrical sleeve-type contacts of a recognized degree, certificate or Operating control: a mechanism regulating professional standing, or who by extensive or guiding the operation of equipment that Platform: an elevated work surface knowledge, training and experience, has ensures a specific operating mode composed of one or more platform units successfully demonstrated the ability to solve or resolve problems related to the Operating device: a device actuated Modular: any platform assembled subject matter, the work or the project manually to activate a control from standard components to form various lengths or configurations Rated load: the manufacturer’s OSHA: see Occupational Safety & recommended maximum load Health Act Pick: a fabricated platform with a unique shape, wide in the center and Rated working load: the combined static Outreach: the distance between the fulcrum narrow at the ends weight of men, materials and suspended or point and the suspension point. Also supported equipment referred to as “reach” or “thrustout” Powered: suspended or supported manned equipment used to provide Reactance: the component of impedance Outrigger (suspension): a structural access to the face of the building for that does not dissipate energy. Inductive member extending out from a building or the purpose of construction, reactance stores magnetic energy and structure to support a hanging scaffold maintenance or window cleaning, and hinders the flow of alternating current. which is raised or lowered by powered Capacitive reactance stores electric energy. Outrigger beam (thrustout): the structural hoist equipment member of a suspension scaffold or Relay: an electric device that is designed outrigger scaffold which provides support Platform height: the vertical distance to interpret input conditions in a prescribed for the scaffold by extending the scaffold measured from the ground floor to the manner and, after specified conditions point of attachment to a point out and away platform are met, to respond and cause contact from the structure or building operation or similar abrupt changes in Platform rated load: the combined weight associated electric control circuits Outrigger scaffold: a supported scaffold of workers, tools, equipment and other consisting of a platform resting on material which is permitted to be carried by Resistance (R): the non-reactive outrigger beams (thrustouts) projecting the working platform at the installation, as opposition that a device or material offers beyond the wall or face of the building or stated on the load rating plate to the flow of direct or alternating current. structure, the inboard ends of which are Usually measured in ohms. The larger the secured inside the building or structure resistance the lower the current for a given source (driving) voltage.
Spider® | www.spiderstaging.com | [email protected] | phone: 1-877-774-3370 259 APPENDIX 260 supporting aworker(s),materials orboth work unitanditssupportingstructure usedfor Scaffold: arrest system user toarrestafallwhenusedaspartof Safety harness: to thenominaldesignload Safety factor: level lockingorboth employs theprincipleofinertiallocking,cam/ the fallofanemployee;aropegrabusually engages thelifelineandlockssoastoarrest on alifelineandautomatically, byfriction, Rope grab: (i.e., wirerope) component ofanequipmentinstallation Rope: including theconstructionofroofdeck sheet metalandvaporbarrierwork,butnot and equipment,includingrelatedinsulation, application andremovalofroofingmaterials Roofing work: platform whichhasbeenground-rigged can alsobeusedtoraiseasuspendedworking thistypeofdavit building facebeingserviced; the suspendedworkingplatformabove Roof riggeddavit: platform locatedontheroof where thehoist(s)isusedtoraiseorlower Roof poweredplatform: on aroofcarriagethatismountedthe Roof mountedhoist: not acceptabletouseasacornicehook. support asuspensionsystem.Aroofhookis Roof hook: movement toworkingpositions working platform,providingforitshorizontal Roof car: ofabuilding surface been completed,temporarilybecomesthetop formwork which,becauseabuildinghasnot building; thisdoesnotincludefloorsor Roof: Rolling tower: Roller bumper: to whichitiscoupled disengages fromanotherconnectororobject which asnaphookorcarabinerunintentionally Roll-out (fallarrestdevice): (Continued) of PoweredAccess&SafetyTermsGlossary supports workandmaterial manually elevatingcarriagethat Adjustable: the exterior surface onthetopofa the exteriorsurface the equipmentusedtosuspenda a temporary elevatedorsuspended atemporary astructureforthesuspensionof Spider the anchoringdeviceusedto a decelerationdevicewhichtravels thehoisting,storage, the ratioofnominalstrength ascaffoldsupportedbycasters ® see asystemofstrapswornby | a scaffoldstructurewith www.spiderstaging.com adavitusedtoraise Building faceroller hoist unitsaremounted aworkingplatform theprocessby
| [email protected] Area:
but isstableinitselfor, ifnecessary, not attachedtoanyotherstructure and concreteplacement platform forthoseengagedinrebar of providinganelevatedworking scaffold planksrest,forthepurpose attached toawallformuponwhich to lifttheplatform where multiplehoistsareused platform inanyconfiguration erected withbracingmembers of tubularmetalframes(panels)field bearers andhorizontalplatforms constructed ofposts,runners, support fromthewallsandis posts; thisscaffoldisindependentof from thebasebyadoublerowof structural members wire ropeswhicharesecuredto two essentiallyhorizontalandparallel brackets attachedtoaverticalsurface consisting ofaplatformsupportedby which supportaplatform composed offramedwoodsquares a grid or systemscaffoldcomponentstoform predetermined intervals tied tothestructureat one linesupportingtheinsideand consisting oftwolinesposts, Double pole supporting aworkplatform duty use,composedofhorses incremental adjustments mobile scaffold,capableof byoutriggersand/oranchors stabilized Free standing: Form: Float: Fabricated tubularframe: Double pole: Catenary: Carpenter’s bracket: Built-up: Buggy: Bricklayer’s square: Bracket form: Independent tied: Independent pole: Horse: Hallway: anassemblageoftubeandcouple asuspendedlargearea awoodormetalbracket see a scaffoldforlightormedium see a narrowfabricated aplatformsupportedby Scaffold,Rail | ascaffoldsupported Scaffold, Supported phone:1-877-774-3370 see a scaffoldwhichis arunscaffold Scaffold, Form see ascaffold ascaffold
Scaffold, a system
stirrups working positions lowering oftheplatformtodesired operated astopermittheraisingor overhead supports,soarrangedand more thantwowireropesfrom supported bybearerssuspended having acontinuousplatform casters andmovedmanually scaffold assemblysupportedby extension ladders by bracketsattachedtosingleor consisting ofaplatformsupported fixed lengthsupports from theceilingorroofstructureby consisting ofaplatformsuspended Interior hung: being usedasamobilescaffold components forthesolepurpose of shipped withallnecessary system thatismanufacturedand building orstructure outriggers are structure; theinboardendsof wall orfaceofthebuilding or thrust-outsprojectingbeyondthe work unitsupportedbyoutriggers length ropes overhead supportsbyfixed by bearersandsuspendedfrom consisting ofaplatformsupported are bridgedonetoanother adjustable suspensionscaffoldswhich definition doesnotincludetwo-point platform todesiredworklevels;this the raisingandloweringof and equippedwithmeanstopermit two ropesfromoverheadsupports a platform(s)suspendedbymorethan suspension scaffoldconsistingof various levelssupported scaffold withaseriesofplatformsat or multi-pointadjustablesuspension Mason’s adjustable: Manually propelledmobile: Ladder jack: Prefabricated mobile: Parapet: Outrigger: Needle beam: Multiple-point suspended: Multi-level suspended: Modular: see see ascaffoldconsistingof alight-dutyscaffold Scaffold, Rail Scaffold, System asuspensionscaffold asuspensionscaffold secured insideofthe ascaffold ascaffold atwo-point by common
a
a
SUSPENDED SCAFFOLDING & RIGGING SOLUTIONS
FALL PROTECTION
MATERIAL HOISTING
WIND ACCESS Pump jack: a scaffold system which Swing: a suspension scaffold Screwjack caster: a screwjack with a tube climbs a braced pole using a consisting of platforms end to accept a caster shaft or baseplate SERVICE mechanical, clamping device activated supported by hangers (stirrups) EXPERTISE by the pumping of a foot lever suspended by two ropes from Secondary brake: a brake that is intended overhead supports and to stop the suspended scaffold under FORMS, Rail: a combination of scaffold equipped with means to permit emergency conditions only APPLICATIONS & systems and components used to the raising and lowering of the DOCUMENTS suspend a work platform under platform to desired work levels Self powered platform: a working platform structures, primarily bridges; the where the hoist(s) is used to raise or lower APPENDIX scaffold attaches in various System: a scaffold consisting of the platform configurations to the bridge’s posts with uniformly spaced fixed guardrails, facial girders, beams or connection points that accept Shackle: a U-shaped structural steel parapets; it includes a system of runners, bearers and diagonals attachment device rollers which allow the entire work platform to be moved along under the Temporary: a suspended scaffold Sheave: a pulley wheel inside a hoist or GLOSSARY lower portion of the bridge used to service structures on a block and tackle which is used to gain OF POWERED temporary basis for construction, traction or change the direction of the rope ACCESS & Ship scaffold: see Scaffold, Float alteration, demolition and SAFETY TERMS maintenance Shock (shoring): the impact of material Single-point adjustable suspension: such as fresh concrete as it is released or CONVERSION a scaffold consisting of a platform Tower: a scaffold structure with a dumped on formwork during placement TABLE suspended by one rope from an height greater than its largest overhead support, equipped with a base dimension Shock absorber: a component of a system ALPHABETICAL means to permit the raising and that allows dissipation of energy by PRODUCT INDEX lowering of the platform to desired Tube and coupler: a scaffold extending the deceleration distance work levels consisting of individual pieces of PART NUMBER tubing or pipe erected with Single fixed boom: box type steel section PRODUCT INDEX Single pole: a scaffold which has one special coupling devices which with maximum standard fixed length of 72 line of standards to support the join posts, braces and runners ft (22 m); longer fixed reaches are available outside edge of the deck and utilizes to form an integral load-carrying the wall being built or the structure structure Single-phase circuit: a circuit that differs to support the inside ends of the in phase by 180°. Single-phase circuits putlogs (transoms) Two-point suspension (swing): a have two conductors, one of which may be suspension scaffold consisting of a neutral or three conductors, and one of Stone setters adjustable multiple- a platform supported by hangers which is neutral. point suspension: a platform run (stirrups) suspended by two supported by putlogs and hoists ropes from overhead supports Single-point adjustable suspension suspended from at least four points to and equipped with means to scaffold: see Scaffold, Single-point permit raising and lowering to a permit the raising and lowering adjustable suspension desired working position of the platform to desired work levels Sling: a length of fiber or wire rope spliced Supported: one or more platforms together at the ends to form a circle; used supported by outrigger beams, Window jack: a scaffold, the to wrap around loads for the purpose of brackets, poles, legs, uprights, platform of which is supported hoisting posts, frames or similar rigid support by a bracket that projects through a window opening Snaphook: a self-closing device with a Suspended: keeper, latch or other similar arrangement Scaffold hoist: a device intended to raise that will remain closed until manually Manual: a manually operated and lower a suspended scaffold opened; this includes self-closing, single scaffold suspended by rope action, double action and double locking from an overhead supporting Scaffold layout: a designed drawing snaphooks system so arranged and operated prepared prior to erection showing proper as to permit raising or lowering arrangement of scaffold equipment Soffit: the underside of a subordinate part to desired working positions or member of a building, such as a beam, Scaffold run: a continuous series of stairway, arch, eave, etc. Powered: a power-operated scaffold bays in a single direction scaffold suspended by wire rope Span: the horizontal distance between from an overhead supporting SCFM: standard cubic feet per minute posts, columns or upright support system so arranged and operated members as to permit raising and lowering Screen: a wire or plastic mesh barrier to desired working positions installed between scaffold guardrails and Special purpose fabricated stage: a toeboards to keep tools and materials from platform unit that represents either a falling off the scaffold platform; required modification or a combination of design whenever there are people working or or construction features in one of the passing under scaffolds general-purpose types of scaffold decks or fabricated platforms Screwjack: a load carrying device that allows adjustments in the height of a scaffold or shoring system
Spider® | www.spiderstaging.com | [email protected] | phone: 1-877-774-3370 261 APPENDIX 262 cold-formed onto wirerope Swaged fitting: Suspended, Temporary Suspended scaffold,temporary: Suspended, Swing Suspended scaffold,swing: Suspended, Powered Suspended scaffold,powered: Suspended, Manual Suspended scaffold,manual: anchorage abovetheequipment ropes orcombinationcablesattachedtosome lowered toitsworkingpositionbymeansof equipment thatissuspendedandraisedor Suspended equipment: of repeatingthesefunctionsasspecified. flow offollowcurrenttoground,andiscapable bypassing surgecurrent;itpreventscontinued surge voltagesonequipmentbydischargingor Surge arrestor: rigid support poles, legs,uprights,posts,framesorsimilar supported byoutriggerbeams,brackets, Supported scaffold: the electricalcable-connectors anchorage ofcabletopreventunduestrainon Strain reliefanchor: setters adjustablemulti-pointsuspension suspension scaffold: Stone settersadjustablemulti-point mechanism tothesuspendedplatform Stirrup: power source reduced voltageandcurrentfromthemain provides oneormoreelectricaloutletsat Step-down transformer: a motorduringthestartingperiod Starting amps: Stand-by power: Stage: overturning moment existing stabilizingmomenttotheprobable Stability factor: vertical) thatcauseoverturning than themomentforces (horizontal and that existtopreventoverturningaregreater sum ofallthemomentforces (deadand live) Stability: sections ofposttogethertomakealonger connection; (b)amethodofconnectingtwo of ropestogethertomakeapermanent Splice: (Continued) of PoweredAccess&SafetyTermsGlossary see (a)amethodofweavingthestrands thedevicethatconnectshoist aconditionofstructurewherethe Spider Platform themaximumcurrentdrawnby ® aprotectivedeviceforlimiting acalculatedratioofthe a metalsleevethatis | see www.spiderstaging.com oneormoreplatforms amechanicaldevicefor See Emergency Power buildingmaintenance atransformerthat Scaffold, Stone see see see Scaffold, see Scaffold, Scaffold,
Scaffold, |
[email protected] perform acertaintaskoroperation perform instruction andhasdemonstrated theabilityto Trained personnel: or sheave a frictionforce betweentheropeanddrum designed toclimbtheropeby applicationof does notaccumulatethesuspensionropebutis Traction drumorsheavehoist: freely laidontheroof Track: (suspended) Total load(suspended): guardrail system Toprail: falling ofmaterial,toolsandotherlooseobjects the endsofaplatformunittoguardagainst Toeboard: travel onthefaceofbuilding building andasuspendedunitduringitsvertical continuous positiveengagementbetweenthe Tie-in-guide: positively engagesthebuildingtie-in-guides Tie-in-device: member toasupportingdevice Tieback: Thrustout: may begrounded. connected totheneutralpointofcircuit that wire orfourwiththefourthbeing is, 120°.Athree-phasecircuit maybethree that differinphasebyonethirdofacycle, energized byalternatingelectromotivesources Three-phase circuit: device beinggoverned maintain theinterruptionofcurrentflowto not necessarilyonshortcircuit, tocauseand a deviceoperativeonexcessivecurrent,but Thermal overloadprotection: with terminalsforconnectingwires Terminal block: suspension wirerope Tail line: members orotherobjects out ofcontrolandstrikingworkers,scaffold hoisted orloweredtokeepitfromswinging Tag line: interconnected atpredetermined levels runners, bearersanddiagonalsthatcanbe posts withfixedconnectionpointsthataccept System scaffold: changing connectionsinacircuit Swing stage: standard I-beamshapesanchoredor theuppermosthorizontalrailofa anattachmentfromastructural asecondropeattachedtoloadbeing the non-supportingendofa abarriersecuredalongthesidesand see portionofabuildingthatprovides a deviceformaking,breaking,or portionofasuspendedunitthat Outrigger (suspension) an insulating base equipped aninsulatingbaseequipped | ascaffoldconsistingof phone:1-877-774-3370 one whohasreceived acombinationofcircuits See Load, Total theeffectof a devicethat and roofcarriage Turntable: material orboth unit whichsuspendsahoistforworkers, Trolley system: Trolley line: powered motors horizontally ontheroofwithelectrically Traversing: to bemovedfromoneworklocationanother Transportable outriggers: values ofvoltageandcurrent at thesamefrequency, usuallywithchanged electromagnetic inductionbetweencircuits windings, usedtotransferpowerby of asinglewinding,ortwomorecoupled Transformer: interfere withitsoperation interfere protected thatexposuretotheweather willnot Weatherproof: one amperetoflowinacircuit equal tothepowerusedwhenone voltcauses Watt: only foraccessandnotasaworklevel Walkway: electric potential,expressedinvolts Voltage: between thepointsisonewatt of oneamperewhenthepowerdissipated aconstantcurrent conducting wirecarrying of electricpotentialbetween2pointsona electromotive force, equaltothedifference Volt: inspection byaregisteredprofessionalengineer Verified: over theequipment User: engineering anddesignstandards and inthehome,accordancewithasetof wide varietyofequipmentusedinindustry organization thatteststhesafetyaspectofa Laboratories,Inc.: Underwriters Laboratories, Inc. UL: at itsends U-bolt: Scaffold, Two-point suspension Two-point suspendedpoweredscaffold: thimble tothemainropesupport of awireropewhichhasbeenloopedover Twin baseclip: the common abbreviation for Underwriters the commonabbreviationforUnderwriters aunitofmeasureelectricalpower, anindividualhavingaccesstoorcontrol a unitofmeasureelectricpotentialand aU-shapedmetalrod,threaded electromotiveforce, ordifferencein acceptedbydesign,evaluation,or a portion of a scaffold platform used a portionofscaffoldplatformused horizontal pivotpointbetweenmast movingtheroofcarriage ahorizontallifeline astaticelectricdeviceconsisting equipmentsoconstructedor anoverheadtrack-mounted a deviceusedtofastentheend outriggersdesigned an
see SUSPENDED SCAFFOLDING & RIGGING SOLUTIONS
FALL PROTECTION
MATERIAL HOISTING
WIND ACCESS Web: a member which separates flanges Wind speed: the speed, measured in miles Working platform: suspended or supported on a beam per hour or meters per second, of the wind equipment intended to provide access SERVICE at elevation to the face of a building and manned by EXPERTISE Whipcheck: safety cable used to restrain persons engaged in building maintenance air hoses if an end breaks Winding drum hoist: a type of hoisting FORMS, machine that accumulates the suspension Wrap: one complete turn of the APPLICATIONS Winch: a stationary motor-driven or wire rope on the hoisting drum suspension wire rope around the & DOCUMENTS hand-powered machine used for hoisting surface of a hoist drum or hauling, having a drum around which is Work basket (cage): see Scaffold, APPENDIX wound a rope or chain attached to the load Single-point adjustable suspension being moved
GLOSSARY OF POWERED ACCESS & SAFETY TERMS
CONVERSION TABLE
ALPHABETICAL PRODUCT INDEX
PART NUMBER PRODUCT INDEX
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Spider® | www.spiderstaging.com | [email protected] | phone: 1-877-774-3370 263