Roof Live Load Reductino

Snow load is different than roof live load.
Roof live load reductino. The live load on a roof is the weight of any temporary objects on the roof. R 1 0 6. The equation in the ibc is lr lor1r2. The building codes allow for a roof live load reduction for tributary area and roof slope.
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. The nature of roof live load is different from that of floor live load so the approach to reducing roof live load is different from that used for floor the requirement is presented in asce 7 05 4 9. Where snow isn t a problem the live load can come from people working on the roof and any equipment they. R2 is a reduction factor for roof slope above 4 12.
1603 1 3 roof snow load data. 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. Likewise roof live loads in the hong kong building regulation can be reduced as a function of the slope.
Find the answers to these questions with our snow load calculator. When should i shovel snow off my roof. 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. 1603 1 2 roof live load the roof live load used in the design shall be indicated for roof areas section 1607 13.
R1 is for tributary area above 200 sq. Roof live load may be reduced by the following equation. L r l o r 1 r 2. What is the weight of the snow covering my house.