Roof Live Load Reductino

1603 1 2 roof live load the roof live load used in the design shall be indicated for roof areas section 1607 13.

Roof live load reductino.

Likewise roof live loads in the hong kong building regulation can be reduced as a function of the slope. Roof live load may be reduced by the following equation. Find the answers to these questions with our snow load calculator. Where l r shall not be less than 12 psf and not more than 20 psf.

Use of live load reduction in accordance with section 1607 11 shall be indicated for each type of live load used in the design. The building codes allow for a roof live load reduction for tributary area and roof slope. What is the weight of the snow covering my house. Hence the magnitude of the roof live loads should be specified as for a flat roof and the program allowed to make the reduction based on the slope of the framing.

R1 is for tributary area above 200 sq. Snow load is different than roof live load. The equation in the ibc is lr lor1r2. The live load on a roof is the weight of any temporary objects on the roof.

R2 is a reduction factor for roof slope above 4 12. R 1 1 for a t less than or equal to 200 psf r 1 1 2 0 001 a t for between 200 psf and 600 psf. When should i shovel snow off my roof. 1603 1 3 roof snow load data.

Where snow isn t a problem the live load can come from people working on the roof and any equipment they. Where uniform roof live loads are reduced to less than 20 psf 0 96 kn m 2 in accordance with section 1607 12 2 1 and are applied to the design of structural members arranged so as to create continuity the reduced roof live load shall be applied to adjacent spans or to alternate spans whichever produces the most unfavorable load effect. Commentary in asce 7 05 c4 about roof live load reductions explains the anticipated difference in use of roof areas vs. Roof live load reduction.