Miscellaneous Architectural Roof Loads

Arch 331 note set 13 1 s2014abn 2.

Miscellaneous architectural roof loads.

Specify purchase a metal roof system that has sufficient uplift resist resistance to meet the design uplift loads. Roof load live load design is affected by the shape of the roof whether it is flat curved or pitched. 2attic loads may be included in the floor live load but a 10 psf attic load is typically used only to size ceiling joists adequately for access purposes. Also the roof sheathing working in conjunction with the roof framing must function as a diaphragm to transfer lateral loads to the building s shear walls.

Roof loads are a downward vertical force on the home. For standing seam and through fastened metal panel. The roof sheathing supports gravity loads such as the roof live load snow load and vertical uplift loads. In order to stay intact and in place a roof must be able to resist loads both permanent and temporary that are pushing.

We will use a value between 1 5 and 2 5 to account for this extra stuff. This downward imposed load on the home is also known as the snow load. D dead load l live load l r live roof load w wind load s snow load e earthquake load r rainwater load or ice water load t effect of material temperature h hydraulic loads from soil f hydraulic loads from fluids. Table 3 2 2 summarizes the calculation.

Loads on buildings and structures 2 1 introduction 2 1 1 scope this chapter specifies the minimum design forces including dead load live load wind and earthquake loads miscellaneous loads and their various combinations. This roof system also has wind bracing at the end trusses blocking at the supports and minor wiring. These loads shall be applicable for the design of buildings. Created by wind pressures.

However if the attic is intended for storage the attic live load or some portion should also be considered for the design of. Calculate loads on the roof assembly in accordance with asce 7 or the local building code whichever procedure results in the highest loads. Calculating the load on a flat roof is a challenging task for the layperson that involves knowledge of building materials their weights and local building codes. The north zone middle zone and the south zone are identified on the roof load zone map above.

Load limits on the roof of a building. Table 3 2 2 roof system dead load.