Live And Dead Roof Loads In Nc Residential Design

Dead load live load cold weather load.

Live and dead roof loads in nc residential design.

D dead load l live load l. 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. Where uniform roof live loads are reduced to less than 20 psf 0 96 kn m 2 in accordance with section 1607 11 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. Roofing criteria state of north carolina pat mccrory governor department of administration kathryn johnston acting secretary.

Ground snow load commonly 10 psf usually roof live load governs unless snow drifts are considered frost heave. Loads used in design load equations are given letters by type. Structural design solutions p c. Wind uplift pressures c.

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. The values for dead loads in table 3 2 are for commonly used materials and constructions in light frame residential buildings. It is intended to advance residential building design by unifying the current practice of applying design loads. Light frame wood roof with wood structural panel sheathing and 1 2 inch gypsum board ceiling 2 psf with asphalt shingle roofing 3 psf 15 psf.

The scope therefore is limited to single family attached and detached buildings. With conventional clay tile roofing. That a designer may find useful and necessary. This criteria for roofing design is a compilation of data policies legal aspects preferences experiences prejudices etc.

Reinforced concrete creates the heaviest dead loads but also supports the most weight with its tremendous compressive strength. Residential design loads construction presentation by. With tar and gravel. The might of the dead load or lack thereof often defines how much live load it can handle.