Installation note: (Considering the installation of sprinkler system in the sloped roof).
As per: IS 15105 Clause No. 11.1.1:
All the measurements between sprinklers or of areas covered by group of individual sprinklers shall be taken in the horizontal plane.
Notwithstanding the above provisions, the hydraulic calculations shall show the dimensions of the true lengths measured along the slope of the pipe.
As per: IS 15105 Clause No. 11.1.2:
Sprinkler shall be installed upright or pendent as required under the circumstances, with the deflector parallel to the slope of the roof, ceiling or pitch line of stairs.
As per: IS 15105 Clause No. 11.1.3:
where the slope of the roof is greater than 1 in 3, a line of sprinklers shall be fitted at the apex unless there is a row of sprinklers at not more than 750mm distant radially therefrom.
As per: IS 15105 Clause No. 10.1.11:
All installation pipework above ground shall be installed at a slope not less than 1:500 for horizontal run of pipes. Normally the pipework shall slope through the installation valve. If the pipework is trapped (below the level of installation valve for example in the basements), arrangements shall be made to provide drain cocks at the bottom of such pipes to drain the trapped water.
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