Cold formed steel sections shall be fastened by self tapping screws or by nuts

Cold formed steel sections shall be fastened by self

This preview shows page 147 - 154 out of 164 pages.

Cold formed steel sections shall be fastened by self tapping screws or by nuts and bolts. Welding shall not be employed. 8.2 Roof covering 8.2.1 Weather protection 8.2.1.1 General Roof coverings shall be designe d and installed in accordance with these requirements and the manufacturer's installation instructions such that the roof covering serves to protect the building or structure. 8.2.1.2 Flashing Flashing shall be installed in such a manner as to prevent moisture entering the wall through the joints in the coping, through moisture permeable material, at intersections with the roof plane or at parapet wall penetrations. Flashing shall be installed at the following locations: (a) at wall and roof intersections; (b) wherever there is a change in roof slope or direction; and (c) around roof openings. Where flashing is of metal, the metal shall be corrosion-resistant with a thickness of not less than 0.50mm . 8.2.1.3 Coping Parapet walls shall be properly coped with non-combustible, weatherproof materials of a width no less than the thickness of the parapet wall.
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PCTTS 599: 20XX 140 8.2.1.4 Roof drainage Unless roofs are sloped to drain over roof edges, roof drains shall be installed at each low point of the roof. Where required for roof drainage, scuppers shall be placed level with the roof surface in a wall or parapet. Scuppers shall be located as determined by the roof slope and contributing roof area. 8.2.1.5 Overflow drains and scuppers Where roof drains are required, overflow drains having the same size as the roof drains shall be installed with the inlet flow line located 50mm above the low point of the roof, or overflow scuppers having three times the size of the roof drains and having a minimum opening height of 100mm may be installed in the adjacent parapet walls with the inlet flow located 50mm above the low point of the adjacent roof. Overflow drains shall discharge to an approved location and shall not be connected to roof drain lines.
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PCTTS 599: 20XX 141 Figure 8-2 Beam framing arrangements Horizontal beam span Cantilever Slope in ° Beam section a) Beam type 1 (see Table 8-3) Slope in ° Horizontal beam span Cantilever b) Beam type 2 (see Table 8-4) H profile 2 H profile Wall or concrete beam Wall or concrete beam 3 d minimum c) Typical combinations Typical assembly for beam more than 150mm
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PCTTS 599: 20XX 142 Table 8-3 MS beam Type 1
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PCTTS 599: 20XX 143 Table 8-4 MS beam Type 2
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