Minimum Roof Dead Load

Arranged so as to create continuity the minimum applied loads shall be the full dead loads on all spans in combination with the floor live loads on spans selected to produce the greatest load effect at each location under consideration.

Minimum roof dead load.

Remember these loads are distributed uniformly over the entire surface of the roof. A floor live loads. 1 2d 1 0w l 0 5 l r or s or r 5. The dead load of a typical asphalt shingled wood framed roof is about 15 pounds per square foot.

Where uniform roof live loads are reduced to less than 20 psf 0 96 kn m 2 in accordance with section 1607 13 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. The load increases with the use of heavier roofing material. Dead load of attic floor when floored 20 lbs. For a larger map with greater detail refer to asce 7 98.

In areas where the ground snow load is less than 15 psf the minimum roof live load refer to section 3 4 is usually the controlling rgavity load in roof design. Section 1603 1 1 b any special additional superimposed dead load if applicable. Minimum camber recommendations found in the aitc tcm for glued laminated timber beams in roof applications is 1 5 times the dead load deflection. Ft dead load of roof of wood shingle construction 10 lbs.

3 20 residential structural design guide. Floor live loads are permitted to be reduced in accordance with section 1607 10. Chapter 3 design loads for residential buildings. The tpi commentary for section 7 6 2 also recognizes a camber amount equal to 1 5 times the dead load due to deflection.

Structural design required minimum load assumptions and data. When used for storage only dead load of attic floor not floored 10 lbs. Or s or r l or 0 5w dead load d in 1 through 5 and 7. County amendment d snow loads.

0 9d 1 0e effect or 0 9 when resisting the load when permanent. Minimum uniformly distributed live loads. Structural design load minimum requirements ibc 2018. A clay tiled roof may have a dead load.

Here each square foot of roof system delivers 50 pounds of live load and 15 pounds of dead load 65 psf total to the structural support system. 1 2d 1 0e l 0 2s when h loads are present they shall have 6. C roof live loads.