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.

Wind uplift pressures c. With tar and gravel. That a designer may find useful and necessary. Residential design loads construction presentation by.

The scope therefore is limited to single family attached and detached buildings. 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. 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. Ground snow load commonly 10 psf usually roof live load governs unless snow drifts are considered frost heave.

D dead load l live load l. Loads used in design load equations are given letters by type. Roofing criteria state of north carolina pat mccrory governor department of administration kathryn johnston acting secretary. With conventional clay tile roofing.

Reinforced concrete creates the heaviest dead loads but also supports the most weight with its tremendous compressive strength. Method of determining design loads for typical residential construction in the united states. Structural steel offers much less of a dead load and provides superior support for live loads in multi story buildings. The values for dead loads in table 3 2 are for commonly used materials and constructions in light frame residential buildings.

This criteria for roofing design is a compilation of data policies legal aspects preferences experiences prejudices etc. Structural design solutions p c. It is intended to advance residential building design by unifying the current practice of applying design loads. On a roof with a slope greater than 4 to 12 the live load limit is typically adjusted downward from 20 psf to 15 psf to allow for the relatively greater dead load on the steeper roof.