Inclined Roof System Trimoterm SNV
Technical Document No. 35 / Version 3.1 / April 2010 CONTENT
1.0 Technical Description of Roof System Trimoterm SNV [1] 1.1 General [1] 1.2 Panel profile [1] 1.3 Panel composition [1] 1.4 Technical data [1] 1.4.1 Basic technical data [1] 1.4.2 Coatings [2]
2.0 Design Procedure [3] 2.1 Panel thickness selection [3] 2.2 Structural design data [3] 2.3 Fixing method [4] 2.4 Snow guards [4] 2.4.1 General [4] 2.4.2 Snow guards arrangement and fixing [4] 2.5 Lightning rods [6]
3.0 Assembly Instructions [6] 3.1 Installation recommendations [6] 3.2 Sealing [9] 3.2.1 Sealing the longitudinal joint between panels [9] 3.2.2 Assurance of roof water-tightness [10] 3.2.3 Water vapour diffusion [11] 3.3 Panel fixing [12] 3.4 Lifting methods [13] 3.5 Installation details [14] 3.5.1 Roof extension detail [14] 3.5.2 Ridge detail [15] 3.5.3 External gutter detail [16] 3.5.4 Valley gutter detail [17] 3.5.5 Snow guard detail [18] 3.5.6 Lightning rods detail [19]
4.0 Packing, Transport and Storage [20] 4.1 Packing [20] 4.2 Transport [20] 4.3 Storage [21]
5.0 Maintenance [21] 5.1 Annual checking of a roof [21] 5.2 General recommendations [21]
All rights to alteration reserved. The last versions of documents is available on www.trimo.si 1.0 Technical Description of Roof System Trimoterm SNV
1.1 General Trimoterm SNV roof panels in a standard module width of 1000 mm represent basic Trimo roof system. They are fixed on roof purlins that are placed over the roof slope at specified spans. The SNV roof system offers excellent technical properties, a long life span and allows creative design freedom. The assembly system using Trimoterm fire-proof panels excels in high fire-resistance, excellent thermal and sound insulation. The range of application of SNV roofs is extremely wide. They are suitable for business, commercial, production buildings, as well as those constructed for representative purposes. Trimoterm SNV panels can be also used as façades. 1.2 Panel Profile
The top steel sheet is a uniform trapezoid form, but there are three possibilities for the bottom steel sheet: s-profile - SNVs, smooth - SNVg, v-profile - SNVv. Fig.1: Possible forms of Trimoterm SNV roof panels
side A
side B
Trapezoid profile
S-profile Profile Type Side A Side B Trapezoid • V-profile S-profile • V-profile • Smooth profile Smooth profile •
1.3 Panel Composition Trimoterm SNV fireproof panels consist of a completely galvanised shallow and deep-profiled, colour coated steel sheet of 0.5 mm and 0.6 mm thicknesses. The steel sheet is bonded to the panel core which is of incombustible lamellated class A1 mineral wool (EN ISO 1182). All three layers make a solid panel with a thickness ranging between 60 - 200 mm depending on the required load-bearing capacity, tightness and assembly requirements. A protective polyethylene foil is applied to the panel surface to protect it during handling, transport and assembly. The foil is removed after the assembly has been completed. Panels can be up to 14 m long.
1.4 Technical Data 1.4.1 Basic Technical Data
Table1: Technical data for Trimoterm SNV roof panels
Tehnical Data SNV SNV 60 SNV 80 SNV100 SNV 120 SNV 150 SNV 172 SNV 200 Panel thickness (mm) 60 80 100 120 150 172 200 Weight SNV (kg/m2) Fe 0.6 / Fe 0.6 18.9 21.3 23.7 26.1 29.7 32.4 35.7 U Thermal conductivity (W/m2K) [EN ISO 10211-2] 0.61 0.47 0.38 0.32 0.26 0.23 0.20 Fire-resistance class REI [acc to EN 1365-2]* REI 30 REI 60 REI 90 REI 120 REI 180 Combustibility of insulant core [acc to EN13501-1] Non-combustible, class A1
Rw Sound reduction (dB) [EN ISO 140-3] 32 Min. roof slope 3° with additional sealing Cover width (mm) 1000 Panel length (m) up to 14
* Required control of spans relating to the static system and loading.
No.35/V-3/7-2006 1 1.4.2 Coatings
Two types of colour coatings are used: - Polyester based marked as SP − standard protection. - Polyvinylidenfluoride based marked as PVDF (available on request). First the steel sheet is galvanised with a zinc layer thickness of 275 g (Zn)/m2 (EN 10326, EN 10327). The steel sheet is coil coated representing painting between cylinders and drying in a furnace at a min. temperature of 200°C. All shades of the RAL scale are possible. Standard colour shades of Trimoterm SNV panels (valid for protection based on polyester - SP) are: RAL 9002 − grey while, RAL 9006 − aluminium white, RAL 8017 − Trimo brown, RAL 7035 − light grey, RAL 5010 − gentian blue, RAL 3009 − oxide red. Steel sheet can be coated using colour on base upon a special request (e.g. on PVC, silicone, polyester, etc.) that may have other properties. Per client’s request or project requirements coatings such as Plastisol, Corus HPS200, Corus Celestia etc. are also available.
Table 2: Basic properties of an individual type of protection
TYPE OF CORROSION PROTECTION SP SP PVDF PVDF+ PUR PVC(P) PVC+F
Corrosion classification [DIN 55928-8] II III III III III III III Total organic thickness (my) [EN 13523-1] 15 25 25 35 50 175-200 120-200 Corrosion resistance External EN 10169-2 — RC3 RC3 RC4 RC5 RC5 — category ** Internal EN 10169-3 CPI2 CPI3 — CPI4 CPI5 CPI4 CPI5 Rural - normal C2 — ••• ••• ••• ••• •*** — Urban and industrial C3 and C4 — •• ••• •••• ••• •*** — 0 < 10 km from sea C5 - M — — •• ••• ••• •*** — Martitme 10 < 20 km from sea C4 — • •• ••• •••• •*** — [EN 10169-2] atmosphere / atmosphere Types of outdoor Types
corrosivity category corrosivity category Severe industrial C5 - I — — — • • •*** — Non-corrosive atmosphere Ai1 Routine upkeep - normal -40°Cà25°C •• •• — •• ••• •• ••• Low humidity 0% - 40%* Non-corrosive atmosphere Ai2 Routine upkeep - normal 0°Cà25°C •• •• — •• ••• •• ••• Medium humidity 40% - 60%* Non-corrosive atmosphere Ai3 Non-intensive cleaning 0°Cà25°C — • — •• ••• •• ••• High humidity 60% - 80%*
Slightly corrosive atmosphere Ai4 Non-intensive cleaning à Humid 0°C 30°C — — — •• ••• •• •••
[EN 10169-3] (risk of condensation) 60% - 80%*
Corrosive atmosphere Ai5 Intensive cleaning à Very humid (frequent risk of 0°C 35°C — — — — — — •• condensation) 80% - 90%* Types of indoor atmosphere /corrosivity category of indoor atmosphere Types Highly corrosive atmosphere Ai6 Highly intensive cleaning à Satureted (permanent risk of 0°C 40°C — — — — — — — condensation) 90% - 100%*
Temperture resistance (°C) +70 +80 +110 +110 +110 +70 +70 UV resistance category [EN 13523-10] — Ruv3 Ruv4 Ruv4 Ruv4 Ruv2 — Flexibility •• •• ••• •••• •••• •••• •••• Staining resistance •• ••• •••• •••• •••• •• •••• Note: •••• suitable without reservations ••• very suitable •• suitable • suitable with reservations/contact Trimo - unsuitable
* Temperature must not fall below condensation point when cleaning. See table for details: Condensation point temperature is shown at specific ambient temperature and relative humidity. In case of cooling down, working temperature must be 3° C above condensation point. ** Corrosion categories are defined by climatic conditions of external and internal building environment. Standard external climatic conditions: C1, C2, C3, C4, C5-M and C5-1. Example: outside atmosphere C3 --> steel sheet of corrosion category RC3 or RC4 is selected. *** Recommended for use North of 45th parallel latitude and maximum temperature 70° C.
2 No.35/V-3.1/4-2010 2.0 Design Procedure
2.1 Panel Thickness Selection
Thickness of Trimoterm SNV panel is determined with respect to the client’s request or in accordance with the legislation. Panel thickness selection has a direct influence on the load-bearing capacity, thermal insulation of the roof and thermal stability of the structure.
2.2 Structural Design Data
Max. allowed span supports are determined in relation to the selected panel thickness, loads and support widths. Spans indicated in the diagrams below should be used only as a guide. Diagrams are valid for steel sheet of 0.6 mm thickness and limited deflection to less than L/100 for single, double and multi-span static systems. Full structural design calculation is to be performed by Trimo technical department for each individual project.
Diagram 1: Max. spans allowed for Trimoterm SNV roof panells Span (m) Span
Snow loads (kN/m2) Span (m) Span
Snow loads (kN/m2)
No.35/V-3.1/4-2010 3 2.3 Fixing Method
Structural engineer will determine the required number of screws in accordance with the standards and regulations of an individual country. A detailed calculation prepared by Trimo’s technical department is recommended for each individual building. The principle of screw arrangement relating to the calculated number is shown in Fig. 2.
Fig. 2: Fixing arrangement
1 screw per panel in each purlin
2 screws per panel in each purlin
3 screws per panel in each purlin
4 screws per panel in each purlin
The main factors influencing the fixing calculation are: - Wind load: - basic wind load, - height of building above the ground, - area on the roof (edge and corner areas are more exposed to wind suction). - Building type: - Open, partly open, closed buildings.
Various loads appear on the roof in relation to the factors mentioned and the fixing method should be adjusted to accommodate them. Fig. 3 shows the characteristic fixing points.
Tables for the calculation of fixing are given in the Appendix to the catalogue.
Fig. 3: Characteristic fixing areas
2.4 Snow Guards 2.4.1 General
Installation of snow guards is recommended for all buildings where sliding of snow may present a danger to people and property. Legislation in various countries prescribes obligatory installation of snow guards on buildings with roofs where the inclination is greater than 22° (e.g. Slovenia), but the experience shows that they are actually needed also on low pitch roofs.
Snow guards of type 330 are placed in a line are used for Trimoterm SNV roof panels. They are made of galvanised and colour coated steel sheet.
2.4.2 Snow Guards Arrangement and Fixing
As a priority, snow guards arranged in a line are fixed using screws that are intended for fixing panels on purlins. The fixing method and the basic principle of arrangement are presented in Fig. 4 and 5. The number of snow guards Ns required and the corresponding number of screws nv required for fixing per panel width are shown in Table 3.
4 No.35/V-3.1/4-2010 Table 3: Number of snow guards and number of screws
Length of a roof slope Snow 0 - 6 (6) - 10 (10) - 15 (15) - 20 (20) - 25 (25) - 30
So Roof angle ß nv Ns nv Ns nv Ns nv Ns nv Ns nv Ns (kN/m2) 0° - 10° 2 1 2 1 2 1 2 1 4 1 4 1 0,75 (10°) - 20° 2 1 3 1 4 2 4 3 4 3 4 3 (20°) - 30° 2 1 4 3 4 3 4 3 4 4 4 4 0° - 10° 2 1 2 1 2 1 4 1 4 2 4 3 1,00 (10°) - 20° 2 1 4 1 4 3 4 3 4 3 4 4 (20°) - 30° 4 1 4 3 4 4 4 4 4 4 4 5 0° - 10° 2 1 2 1 4 1 4 2 4 3 4 3 1,25 (10°) - 20° 3 1 4 2 4 3 4 3 4 4 4 4 (20°) - 30° 4 2 4 3 4 4 4 4 4 5 4 6 0° - 10° 2 1 2 1 4 2 4 3 4 3 4 3 1,50 (10°) - 20° 3 1 4 3 4 4 4 4 4 4 4 5 (20°) - 30° 4 2 4 3 4 4 4 5 4 6 4 7 0° - 10° 2 1 4 1 4 3 4 3 4 3 4 4 2,00 (10°) - 10° 4 2 4 3 4 4 4 5 4 5 4 6 (20°) - 30° 4 3 4 4 4 5 4 6 4 7 4 8
For roofs of inclination greater than 30° a special calculation to determine snow guard number and screw number can be prepared by Trimo’s technical department.
The first snow guard at the eaves should be fixed at the location of the first purlin.
Fig. 4: Principle of snow guard arrangement on a roof slope
Fig. 5: Number of screws per panel width Number of screws Number of screws
No.35/V-3.1/4-2010 5 2.5 Lightning Rods
From experience and expert opinion, it has been established that steel sheet roofing does not attract lightning strikes any more than any other roofing types. Despite this fact, standard lightning protection installation is feasible.
Trimo’s technical department can provide any other detailed information. Section 3.5.6 presents two details of the installation of a lightning rod.
3.0 Assembly Instructions
3.1 Installation Recommendations
When installing panels and details, dry wool must be put in. During the installation phase, the open details and roof panels must be protected against rainwater. Trimoterm SNV roof panels can be fixed into roof load-bearing steel, wood or concrete purlins with an intagrated steel profile of minimal dimensions 60/40/3 (Fig. 6). For fixing into wood, lamelated beams are commonly used. Where the substructure is made of solid wood, additional steel sheet is required.
Fig. 6: Sub-structure types for fixing Trimoterm SNV panels
Min. roof slope is α =3° (~5%). Maximum spans should be taken into account (Fig. 7); it is determined in Trimo’s Technical Documentation − spans for Trimoterm SNV roof panels. The measures required due to the inclination are presented in Section 3.2.1.
Fig. 7: Span and inclination of the roof slope
Min. intermediate support width is 60 mm, and at the end support is 40 mm which is determined according to static calculation (Fig. 8).
6 No.35/V-3.1/4-2010 Fig. 8: Minimal support widths
Intermediate support End support
Before the first panel is placed the substructure geometry should be checked. The first panel is placed in the end crosswise axis of the building by suitable levelling in the eaves − rectangular on the longitudinal axis of the building.
A dripping edge of at least 80 mm should be made on panels in the eaves to prevent moistening mineral wool in the panel (Fig. 9). A dripping edge for longer panels is usually made by Trimo. Cleanliness of these edges is to be checked on-site; if required the rests of wool and adhesive are to be removed.
The dripping edge may be on the left or on the right side (Fig. 10). In case of a saddle roof this enables simultaneous assembly on both roof slopes from the same direction (Fig. 11).
Regardless of the roof inclination it is necessary to additionally bend the steel sheet of panels between trapezoids in the eaves at an angle of 45° - 60° downwards (Fig. 12) using a suitable plumbing tool.
Fig. 9: Dripping edge of a panel
Protection against moistening
Fig. 10: Left and right dripping edges
Left dripping edge Right dripping edge
Fig. 11: An example of quick assembly of a saddle roof Fig.12: Bending of steel sheet in the eaves
No.35/V-3.1/4-2010 7 Trimoterm SNV panels have a protective foil applied on the top and bottom sides to protect its colour coated surfaces against any possible damage during transport, handling and assembly. The foil is removed from the bottom side before the assembly of an individual panel. From the top side it is removed before the work has been completed. If necessary, it can be removed from some places already during the assembly (e.g. on the longitudinal joint of two panels, under screws, flashing, etc. - Fig. 13).
If panels are stored for a longer period of time, the foil should be removed at the latest after the expiry of three months. If panels are stored in the open air, they should be protected against the sun; otherwise removing of the foil may be difficult. Fig. 13: Removal of a protective foil
When panels are cut during the assembly, only scissors and saws that do not heat the cutting edge to a high temperature (Fig. 14) may be used. High temperature can destroy the anticorrosive protection in the immediate vicinity of a cut. Therefore use of grinding machines is prohibited for such purposes! All small metal parts that appear as a consequence of cutting and drilling are to be removed immediately from the surface of panels, or at the latest when the daily work has been completed.
Fig. 14 Recommended tools for panel cutting
Marking or scratching with nails or similar sharp objects that can damage the protective colour coated layer is prohibited.
Before panel assembly it should be checked that the end trapezoid that overlaps the trapezoid of the neighbouring panel is completely clean (Fig. 15). If it is not, it must to be cleaned! Care should be taken to ensure that the sealing tape already installed does not get damaged.
Fig. 15: Checking of trapezoidal panel section
8 No.35/V-3.1/4-2010 Mineral wool is protected by a self-adhesive tape which is placed on the longitudinal sides of the panel (Fig. 16). The tape does not need to be removed before the assembly.
Fig. 16: Self-adhesive tape on longitudinal edges
3.2 Sealing
3.2.1 Sealing the Longitudinal Joint Between Panels
During assembly special attention should be paid to ensure the tight fitting of panels. There should be no space in the longitudinal joint between the neighbouring panels (Fig. 17).
Fig. 17: Tight fitting of panels
If butyl or silicone mastic seal is to be placed into the longitudinal joint, it should be applied in a way presented in Fig. 18 and 19. Mastic seal is placed in an individual joint before the assembly of the following panel.
Fig. 18: Putting mastic seal in a panel
Fig. 19: Detail of applying the mastic seal in a panel
Installation position for other sealing materials is shown in TRIMO Standard details.
Installing the Trimoterm SNV panels without seals is only allowed with the consent of the Trimo technical services.
No.35/V-3.1/4-2010 9 3.2.2 Assurance of Roof Water-tightness
Required measures for Water-tightness are shown in table 4 and 5. Table 4: Roof slope and measures required
ROOF INCLINATION REQUIRED MEASURES 1. The standard equipment of SNV panels includes sealing tapes (Fig. 20). a) longitudinal joint seal K 9/3 inside the trapezoid on the external cold side min 3° b) longitudinal panel joint seal Φ5.5/3.5 on the internal warm side. (~5%) 2. Placement of additional stitching screws is presented in Fig. 21. Instructions for fixing and assembly (Section 3.0) 3. Sealing of panel extension with pre-compressed expansion sealing tape 20x2/10 mm in two lines is presented in Fig. 22 A detailed performance is presented in the detail of roof extension. 4. Bending of steel sheet on the bottom level among trapezoids, in the eaves and on the ridge (Fig. 23). 5. For inclines of 3-5 degrees, it is necessary to create openings with coatings over the openings (e.g. Thortex). 6. At inclines greater than 5 degrees installation of openings with steel sheet above the opening up to the ridge is allowed. 7. The maximum allowed length of the roof slope is 30.0 m. For longer roof slopes, consent from the Trimo technical services is required.
Fig. 20: Panel laying Fig. 21: Stitching screws on a longitudinal joint Sealing tape K 9/3
stitching screws
Sealing tape Φ 5.5/3.5 Fig. 22: Sealing of panel extension Fig. 23: Bending of steel sheet on the ridge and eaves
Sealing a panel extension with pre-compressed sealing tape 20x2/10 mm arranged in two lines is shown in standard detail AA4/1 and in the chapter 3.5 Installation details.
Fig. 24: Installation of an opening on a roof using a steel sheet
10 No.35/V-3.1/4-2010 3.2.3 Water Vapour Diffusion
The details of the installation and the panel joints with built-in seals ensure diffusion waterproofing of the roof during normal climatic conditions. The transversal joints and all other details must be sealed with materials that are highly resistant to water vapour diffusion (e.g. EPDM, butyl, etc.). For facilities with indoor climactic conditions that deviate from the normal (cold rooms, pools or “wet” productions), you should contact the Trimo technical services.
3.3 Panel Fixing
Only screws made of stainless steel and washers with a diameter of 19 mm (also of stainless steel) and EPDM sealing tape may be used for fixing the panels. Min. thickness of a screw is 6.3 mm for selftapping and 5.5 mm for selfdrilling fixings. Panels are fixed through the trapezoidal sections by means of mandatory use of saddle washers with seals (Fig. 25).
Fig. 25: Fixing method of Trimoterm SNV roof panels
Self-tapping screws of type A are used for fixing to wooden and thin steel purlins (steel thickness up to 3 mm). If steel purlins are 3 mm thick or greater, self-tapping screws of type B should be used. The use of self-drilling screws of type C is also allowed for steel purlins. All screw types are presented in Fig. 26.
Fig. 26: Screw types
Type A Type B Type C
A borehole of a suitable diameter should be drilled through a panel and purlin according to instructions of the fixing manufacturer if panels are fixed to a steel sub-structure with A or B type screws. Table 6 presents all required sizes of boreholes of producer “SFS Stadler”. No preliminary drilling of holes is allowed for type C fixings.
Table 6: Diameter of a borehole for a screw regarding thickness of a sub-structure
Thickness of a sub-structure Diameter of a borehole [ mm ] [ mm ]
2.0 - 3.0 (Type A) 5.00 3.0 - 3.9 5.05 4.0 - 4.9 5.35 5.0 - 5.9 5.65 6.0 - 10.0 5.80 >10.0 5.85
No.35/V-3.1/4-2010 11 Screw length depends on thickness of Trimoterm panels and sub-structure type in accordance with the instructions of the fixing manufacturer. Care should be taken to tightening screws correctly to ensure they are not too tight or too loose. Correct fixing method is presented in Fig. 27. The protective foil should be removed in places before fixing (Fig. 28). The foil is finally removed after the works on the roof have been completed.
Fig. 27: Correct fixing of tapping screws
Fig. 28: Removal of the foil on a fixing place
3.4 Lifting Methods
The use of vacuum grippers with protection is recommended for lifting the panels and their placing on a roof (Fig. 29). Where the vacuum gripper holds a panel the protective foil should be removed before its lifting. The procedure of putting a panel on a roof is shown in Fig. 30.
Fig. 29: Vacuum gripper
Fig. 30: Assembly of panels using vacuum grippers
12 No.35/V-3.1/4-2010 The use of mechanical grippers is also possible. Assembly of panels is presented in stages − Fig. 31. If panels are light enough, they can be carried and assembled manually.
Fig. 31: Assembly of panels using mechanical grippers A mechanical gripper
3.5 Installation Details 3.5.1 Roof Extension Detail
For long roof slopes (the maximum length of a panel is 14 m) longitudinal extension of panels is required. Therefore, a longitudinal extension detail is shown in Fig. 32. Fig. 33 presents a system of panel extension on a large roof surface.
Fig. 32: Roof extension detail
1 Sealing tape 20x2/10 2 Sealing tape 2x47 3 Self-tapping screw ___x____ 4 Saddle washer 5 Sealing tape K 6 Joint seal 7 Self-tapping screws 6.5x25
Assembly sequence: - Before assembling an individual panel a seal is to be inserted on a double or expanded single purlin (purlin width min. 100 mm) (Item 2) - A pre-compressed 20x2/10 mm expansion sealing tape is to be applied to a panel in two lines (Fig. 34), on an overlap in a length of 200 mm. - The overlapping part should be cleaned thoroughly before the assembly. - Mineral wool of the top panel is to fit tightly to the bottom panel in the joint. - Structural engineer calculates the number and arrangement of self-tapping screws (Item 3) over the purlin or a panel is fixed at least into each second rib.
No.35/V-3.1/4-2010 13 Fig. 33: Correct and incorrect panel assembly sequence Fig. 34: Panel assembly panels in the overlap
PE seal Pre-compressed 2x47 mm expansion seal 20x2/10 mm
3.5.2 Ridge Detail
Fig. 35: Ridge detail on a saddle roof
1 External ridge flashing 2 Internal ridge flashing 3 Covering flashing 4 Thermal insulation 5 Profile filler SNV - negative 6 Sealing tape 3 x 15 mm 7 Butyl sealing tape 2 x 6 mm 8 Self-tapping screw 6.5 x 25 9 Blind rivet 4 x 10 10 Saddle washer 11 Self -tapping screw ___x____
Assembly sequence: - An internal ridge flashing (Item 2) is placed on the ridge purlin; a sealing tape (Item 6) is previously applied to the purlin. - Gradually, Trimoterm SNV panels are placed on the left and the right side and they are fixed into the purlins. - On the panel edge the top steel sheet is bent in a length of 30 mm by a suitable plumbing tool, as it is shown in Fig. 37. - SNV profile filler negative (Item 5) is placed on the panels. - Panel masks (Item 3) are placed on it and then butyl tape (Item 7) is also applied. - Empty space under a ridge tile is filled with low-density mineral wool (Item 4). - At the end external ridge flashing (Item 1) is placed and is longitudinally prolonged by a plumbing joint or an overlap in a min. length of 200 mm and sealed by neutral silicone putty in at least three lines. - The external ridge flashing is fixed to each second rib of the panel with screwsφ 6.3 x 25 mm.
14 No.35/V-3.1/4-2010 3.5.3 External Gutter Detail
Fig. 36: External gutter detail
1 External gutter hook 10 Sealing tape 3 x 15 mm 2 External gutter 11 Saddle washer 3 Outlet connection 12 Blind rivet ___x____ 4 Down pipe 13 Self - tapping screw 6.3 x 25 5 Down pipe support 14 Self - tapping screw ___x____ 6 External gutter mask 15 External eaves mask 7 Internal eaves mask 16 Self - tapping screw 6.5 x 25 8 Thermal insulation 17. Seal SNV - positive 9 Self -tapping screw ___x____ 18. The metal sheet of a dripping edge
Assembly sequence: - Trimoterm SNV panels are laid from the direction determined by the dripping edge of a panel. In case snow guards are installed on the roof, they are fixed to the final purlin (Item 14). The seal EPDM φ 28/3x3 is to be additionally applied between a snow guard and a panel. - Additional bending of steel sheet at an angle of 45° in a length of 10 - 15 mm (Fig. 12) is required in the eaves. - An external eaves mask (Item 15) is riveted from the external side to the façade. Under the top, external gutter hooks are pressed in the core of a Trimoterm SNV panel by using saddle washers (Item 11). Then they are fixed to the top steel sheet with two screws. When arranging hooks special attention is to be paid to their length since they ensure gutter inclination. - External gutter (Item 2) is placed on these hooks and fixed by suitable bending of fixing steel sheet on the hooks. - Low density mineral wool (Item 8) is inserted into the closing space between the façade and Trimoterm SNV roof panel from the inner side. - Internal eaves mask (Item 7) onto which a sealing tape 3x15 mm (Item 10) is preliminarily applied is riveted from the inside to the panels.
No.35/V-3.1/4-2010 15 3.5.4 Valley Gutter Detail
Fig. 37: Detail of a valley gutter
1 Self -tapping screw ___x____ 7 Outlet connection 2 Valley gutter support 8 Down pipe 3 Valley gutter 9 Down pipe support 4 Gutter mask 10 Thermal insulation 5 Drip flashing 11 Sealing tape 2/10x20 mm 6 Self -tapping screw 6.5 x 25 12 Profile filler SNV-POSITIVE
Assembly sequence: - Initially, an gutter mask (Item 4) is placed on the end purlin. A sealing tape 3x15 mm (Item 11) is applied onto it. - Valley gutter support (Item 2) placed over the mask. The correct arrangement ensures suitable inclination required for draining the water. - Mineral wool insulation (Item 10) is placed on the gutter mask (Item 4). - A gutter is placed on in the hooks (Item 3) and fixed by suitable bending of fixing steel sheet on hooks. - Trimoterm SNV panels are laid regarding orientation of the dripping edge of a panel. - Panel steel sheet is to be bent at an angle of 45° in the eaves in a length of 10-15 mm (Fig. 12) between trapezoids. - Through saddle washers panels are fixed to load-bearing purlins by screws. - Finally, drip flashing / Item 5) are fixed into the dripping edge of the panel (Item 5) under which the profile filler SNV- positive is inserted (Fig. 38).
Fig. 38: Profile filler SNV - positive
16 No.35/V-3.1/4-2010 3.5.5 Snow Guard Detail
Fig. 39: Snow guard detail
1 Snow guard 2 EPDM washer φ 28/3x3 3 Self - tapping screw ___x___
Fig. 40: EPDM washer φ 28/3x3
Assembly sequence: - The first snow guard at the dripping edge should be fixed to the first roof purlin. - During the assembly, care should be taken that the distance of a screw from the top edge of a snow guard should be max. 15 mm. - The seal EPDM φ 28/3x3 (Fig. 40) is to be inserted between the snow guard and the trapezoid top. - Ventilation of min. 5 mm for water drainage is necessary on the snow guard extension − i.e. in the same line. - Snow guards are to be arranged equaly. A uniform distance between snow guards is recommended. - As a rule, snow guards are not installed at roof extension section.
No.35/V-3.1/4-2010 17 3.5.6 Lightning Rods Detail
Fig. 41: Detail of fixing a lightning rod to the ridge
1 Roof support profile SON 16 2 Wire φ__ 3 Self - tapping screw 6.3 x____ 4 Gasket φ 28/3x3
Fig. 42: Detail of fixing a lightning rod in the eaves
1 Roof support profile SON 16 2 Gutter clamp KON 06 3 Wire φ __ 4 Wall support profile ZON 03 5 Tapping screw 6.3 x____ 6 EPDM washer φ 28/3x3
A screw with which a external ridge flashing is fixed is also used for fixing lightning support profiles to the roof. The beams on the ridge are fixed at the same distance ranging from 800 to 1000 mm. On a façade side of a building the lightning guard is fixed with a gutter clamp (Item 2) to the gutter or pipe clamp on an outlet pipe. On a wall it is fixed by a roof supporting profile in case of fixing to a Trimo façade or by a wall beam. The latter is fixed to the wall by a wall screwφ 6 x 50 and a pin. The pipe clamp is fixed to a pipe byφ 6 x 20.
WARNING: Arrangement and designing of lightning rods are to be presented in the lightning devices project folder.
18 No.35/V-3.1/4-2010 4.0 Packing, Transport and Storing
4.1 Packing Typically, panels are packed in stacks of height ranging from 200 to 1200 mm (Fig. 43). A stack of panels is loaded on to a Styro-foam base to a height of 100 mm. Varnished surfaces of panels are protected by a self-adhesive protective foil that should be removed at the individual panel assembly stage. A stack of panels is protected by cardboard; wrapping by a stretchable machine packing foil ensures its water tightness.
Possible packing methods: - packing for a road transport, - packing for combined - road & railway transport, - packing for railway transport.
Maximum dimensions of stacks including packaging: - Max. width: 1150 mm − transport by road, 1200 mm - combined transport, 1250 mm - transport by rail - Max. height: 1320 mm − transport by road, 1350 mm − combined transport, 1350 mm − transport by rail, - Max. length: 14150 mm − transport by road, 1420 mm − combined transport, 1420 mm − transport by rail, - Max. weight: 3500 kg.
Fig. 43: Side view of a stack Panels and all protective elements are wrapped by a packaging foil Cover Edge element – distance piece
Labels
Front side
Handling instructions Styro-foam
Detailed information about packing is contained in Trimo Technical Document No. 9 Packing, transport and storing of Trimoterm SNV roof panels. Instructions are available on the Internet (www.trimo.si).
4.2 Transport
Transport of Trimoterm SNV roof panels from the factory to a building site is carried out by trucks or rail. The load should be fixed on a means of transport by fabric carrying belts. A lift or crane truck can be used for carrying of stacks and a fork lift truck for the transport of stacks shorter than 6 m. Moving or pushing of stacks by fork points or use of steel wires for carrying stacks with a crane is not allowed; only load bearing belts of suitable load-bearing capacity can be used for crane handling. Special attention is to be paid to the centre of gravity, since it should be between the forks or the load bearing belts. Only one stack may be carried at a time!
When unloading a truck the truck tarpaulin should be completely removed from the vehicle. Carrying frame of the tarpaulin should also be completely (also from sides) removed so that panels cannot get damaged when lifted.
WARNINGS: - Only one stack may be carried at a time. - Off-loading and site manupulation by a forklift truck is allowed only for stacks of a length up to 6 m. - Lifting by all kinds of cranes is to always be carried out with fabric carrying belts. - Unloading instructions for handling are to be strictly followed. They are attached to a stack and any other handling can easily cause damage. - When stacks are received on a building site a recipient is obliged to complain about all visible defects to a driver.
No.35/V-3.1/4-2010 19 4.3 Storage When storing Trimoterm SNV façade panels the following should be considered: - It is recommended that the stacks be stored in their original packaging, which ensures suitable water tightness. - When storing panels in the open air, a cardboard cover protects them against the sun; if there is no cover, it may be difficult to remove the protective foil. It is recommended that the foil be removed after three months. - Stacks are to be arranged on the flat and solid ground so that a stack cannot sink under its own weight and slip to the ground which is especially dangerous in winter when ice can collect on the foil. - Possible ways of arranging stacks are presented in Fig. 44.
Fig. 44: Arranging of stacks for storing
Low stacks
High stacks
5.0 Maintenance
5.1 Annual Checking of a Roof
In accordance with best practice it is necessary to check a roof and the complete building at least once a year. The purpose of checking is to highlight and remove any potential problem and prolong the useful life of the roof. Annual checking includes: - Cleaning off all dirt collected near openings. - Checking screw tightness and slight manual tightening of screws. - Checking and cleaning of draining elements on the roof up to the place where discharges flow to sand catchers or shafts that have to be regularly cleaned of dirt.
In addition to the roof, draining elements should be regularly controlled and cleaned up to the place where discharges flow to sand catchers or shafts that have to be regularly cleaned of dirt. Cleaning of panels can be carried out only by mild alkaline cleaning agents.
Damage caused to the roof must be repaired immediately when it appears or it is observed. The area of damage should be repaired by a suitable coat and putty is placed over them, if necessary. It is recommended that large damaged places are repaired. All subsequent works are to be carried out by a Trimo approved contractor.
5.2 General recommendations
Walking on a roof is allowed only in soft shoes in the purlin line. Walking over lighting penetrations is prohibited. The use of any aggressive substances for roof cleaning is prohibited due to possibility of damage of anticorrosive colour coating.
Use of a rotating grinding machine (cutting machine) in the vicinity of the Trimo roofing is prohibited since hot parts can damage the coating.
If there are any questions relating to maintenance of a building or if repairs of defects or damage are needed, you are kindly asked to consult “Trimo Service” department.
20 No.35/V-3.1/4-2010 Published by: TRIMO d.d., Design: Meta Gabrijel, Anita Kostanjevec, Photography: Janez Erjavec, Printed Tiskarna Petrič, Ci rculation: 3000/EN, 04/2010