Minimum Roof Dead Load

Minimum roof dead load per ibc cbc jayrod12 structural 6 jul 16 19 24 personally i don t go lower than 15 psf for any roof unless i have accurate information regarding the existing roof construction and i need to sharpen my pencil to get an existing condition to work.

Minimum roof dead load. The values for dead loads in table 3 2 are for commonly used materials and constructions in light frame residential buildings. When used for storage only dead load of attic floor not floored 10 lbs. Dead loads includes the self weight of walls floors beams columns etc. County amendment d snow loads.

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. Section 1603 1 3 ground snow load pg minimum ground snow load shall be 30 psf county amendment minimum flat roof snow load pf if applicable. Dead loads depends upon the unit weight of the material. Dead loads are due to self weight of the structure.

Load types loads used in design load equations are given letters by type. And also the permanent fixtures present in the structure. C roof live loads. The minimum recommended camber for roofs is an amount equal to 1 5 times the dead load deflection.

Dead load of attic floor when floored 20 lbs. V earthquake loads dead loads. Minimum roof live load is 30psf. Used but they typically defined the load cases or combination stress or strength limits and deflection limits.

The load increases with the use of heavier roofing material. 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. B any special additional superimposed dead load if applicable. 3 3 dead loads dead loads consist of the permanent construction material loads comprising the roof floor wall and foundation systems including claddings finishes and fixed equipment.

Live load on attic floor local requirements. A clay tiled roof may have a dead load. Dead load of roof of wood shingle construction 10 lbs. The dead load of a typical asphalt shingled wood framed roof is about 15 pounds per square foot.

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