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.