The sections of the IBC and IRC that deal with sound transmission are IBC Section 1206 and IRC Appendix AK. These code provisions apply to wall and floor/ceiling assemblies separating dwelling units from other dwelling units, or from adjacent public areas, within a building. These provisions do not deal with sound transmission from outdoors to…
As stated in Section 1.1 of ASTM E90, the scope of this standard is limited to building partitions such as walls, operable partitions, floor-ceiling assemblies, doors, windows, roofs, etc. Although it is possible to use ASTM E90 to assess the sound transmission performance of individual components that would be used within an assembly, such use…
2012 International Residential Code (IRC) States: R501.3 Fire protection of floors. Floor assemblies, not required elsewhere in this code to be fire resistance rated, shall be provided with a ½ inch gypsum wallboard membrane, 5/8 inch wood structural panel membrane, or equivalent on the underside of the floor framing member. Exceptions: Floor assemblies located directly over…
Some have interpreted the International Residential Code (IRC) to require continuous headers across multiple spans in order for the building to comply with the IRC wall bracing requirements. This application is mostly seen when there are multiple garage door openings. Some might assume that a continuous header will make the entire front wall of the…
Anchorage of wood sill plates and wood wall sole plates are called out in Section R403.1.6 of the IRC, requiring ½-inch anchor bolts embedded 7 inches into concrete or grouted cells of masonry and spaced at no more than 6 feet on center. A minimum of two anchor bolts are required in each plate and…
No. In the southeastern U.S. where the ultimate design wind speeds are 130 mph or less (and in other areas where the ultimate design wind speeds are less than 140 mph), framing provisions for wall studs and plates and fastening schedules in IRC Section R602 are independent of the lumber species and assigned specific gravity;…
Even in noncombustible construction types (Types I and II), many elements of the building, such as floor coverings, windows and doors, interior finishes, and roof structures can be wood. Permitted combustible building elements in noncombustible buildings are conveniently listed in Section 603 of the IBC. This list also includes structural elements that are constructed of fire…
The International Building Code (available from ICC) requires handrails and guards be designed to resist a load of 50 plf applied in any direction at the top of the handrail or guard, a single concentrated load of 200 lbs applied in any direction at the top, and a 50 lb. load applied horizontally over a one square foot…
The provisions for calculating bending deflection in the National Design Specification (NDS®) for Wood Construction Section 3.5 increase the long-term deflection with a creep factor, Kcr. The creep factor ranges from 1.5-2.0. These NDS design provisions relate specifically to estimating total deflection including the effects of long-term loading. The deflection limit for the D+L load combination only applies to the…
We didn’t find any discussion in any of the codes we’ve referenced. Nothing either allowed or disallowed. The prevalence of surviving historical structures suggest these may be viable. ********* The 2003 International Building Code (IBC) does not define seismic design coefficients for timber braced frames or three hinged arches. The only U.S. code source for…