Irc Attic Dead Load

Attic joists for live loads attic joists that are made from 2x8s may be acceptable for building your attic floor but because every room is variable there are no absolutes.

Irc attic dead load.

Top of required insulation bottom chord of truss designed for live load 20 psf and dead load 10 psf bottom chord of truss designed for live load 10 psf. The international codes i codes are the widely accepted comprehensive set of model codes used in the us and abroad to help ensure the engineering of safe sustainable affordable and resilient structures. The international code council icc is a non profit organization dedicated to developing model codes and standards used in the design build and compliance process. Attic access hatch minimum 24 in.

12 20 04 r301 4 live load. International code council 42 in. Flooring for dead loads may not be sufficient for live loads the loads created by people and the features of living space. The weight of the materials of construction incorporated into the building including but not limited to walls floors roofs ceilings stairways built in partitions finishes cladding and other similarly incorporated architectural and structural items and fixed service equipment.

The minimum uniformly distributed live load shall be as provided in table r301 4. 11 04 2000 edition issued. The material and component weights tables 1 3 and 1 4 may help builders correctly size. Dead load 5 psf.

Maximum ceiling joist spans. Dead loads are defined by the code as follows. Load combinations provide the basic set of building load conditions that should be considered by the designer. The load combinations in table 3 1 are recommended for use with design specifications based on allowable stress design asd and load and resistance factor design lrfd.

The tabulated rafter spans assume that ceiling joists are located at the bottom of the attic space or that some other method of resisting the outward push of the rafters on the bearing walls. Calculating dead loads the prescriptive tables of the irc detailing continu ous footing sizes for conventional frame construction assume average weights of construction materials. International residential code 2015 irc 2015.