Ibc Roof Deflection Limits

Examples of code prescribed deflection limits and live load values are.

Ibc roof deflection limits. B for cantilever members l shall be taken as twice the length of the cantilever. See the table below. Both i codes just say floors 13 years ago. Chapter 3 of the international residential code irc provides the maximum allowable deflection for a given structural member floor roof wall etc.

Living room floors l 360 40 psf. Typical deflection limits referenced in code books are l 360 l 240 or l 180. For secondary roof structural members supporting formed metal roofing the live load deflection shall not exceed l 150. For the purpose of the determining deflection limits herein.

For structural roofing and siding made of formed metal sheets the total load deflection shall not exceed l 60. For secondary wall members supporting formed metal siding the design wind load deflection shall not exceed l 90. For structural roofing and siding made of formed metal sheets the total load deflection shall not exceed l 60. The ibc which wouldn t apply to a sfr allows the greater deflection for roofs supporting non plaster finishes but like the irc it gives one deflection limit for floors period.

In the 2015 ibc the body of table 1604 3 limits the deflection of exterior walls supporting plaster or stucco to l 360 with l being the span of the wall. For continuous aluminum structural members supporting edge of glass the total. These limits are based on live loads and activities experienced in specific rooms of a house. For secondary roof structural members supporting formed metal roofing the live load deflection shall not exceed l 150.

For structural roofing and siding made of formed metal sheets the total load deflection shall not exceed l 60 for secondary roof structural members supporting formed metal roofing the live load deflection shall not exceed l 150 for secondary wall members supporting formed metal siding the design wind load deflection shall not exceed l 90 for roofs this exception only applies when the. I don t see any exception for decks or for floors which have different finishes on the underside. Although it does not specifically name glazed components or assemblies or framing supporting glazing it does establish a deflection limit of l 240 for exterior walls supporting brittle finishes other than plaster or stucco. For aluminum structural members or panels used in roofs or walls of sunroom additions or patio covers not supporting edge of glass or sandwich panels the total load deflection shall not exceed l 60.

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. This section deals specifically with the required live loading for aluminum canopies.