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2006 international Residential Code° <br />The City of Paris is proposing to adopt the 2006 International Residential Code. This handout will <br />summarize the major changes in the 2006 IRC compared to the 2003 IRC. <br />1. Table R301.5 now requires the design live load on the bottom chord of engineered roof <br />trusses to be 20 psf instead of the typical 10 psf when there are two or more adjacent <br />trusses with the same web configuration capable of containing a rectangle 42 inches <br />high or greater by 24" wide or greater, measured between the top of the bottom chord <br />and bottom of any truss member; and provided that the attic area is accessible by a <br />pull down stairway or framed opening in accordance with Section R807.1, and the <br />truss has bottom chord pitch less than 2: 12. This may result in some trusses being <br />designed for bottom chord loads differently than other trusses. It is the responsibility of <br />builder to verify this before the frame inspection (before trusses are set). <br />2. Section R302.1 and Table R302.1 now requires that the minimum fire separation <br />distance (distance from the exterior wall to the property line) shall be 5 feet in order for <br />the exterior wall to be non fire-resistance rated. If the exterior wall is closer than 5' to <br />the property line, it will need to be one hour fire-resistance rated (fire rated wall <br />assembly tested from both sides). <br />Projections, such as eaves or soffits, shall not extend more than 12" into the area <br />where openings are prohibited (i.e. no closer than 2 feet to the property line); and <br />these projections shall be one hour fire-resistance rated on the underside with no <br />openings (i.e. no soffit vents). In the first printing of the 2006 IRC there is a <br />discrepancy in the wording of Section R302.1 and the dimensions shown in table <br />R302.1. The wording in the text is correct and the dimension in Table R302.1 <br />showing 4 feet for minimum fire separation distance for projections should be 2 <br />feet. This will be changed by errata from ICC. <br />Penetrations in walls that are closer than 5' to property line will need to be protected in <br />accordance with Section R317.3. This will include such items as electrical boxes for <br />light fixtures, gas pipe entries, hose bibbs, etc. <br />Openings in walls located from 3' to 5' from the property line are restricted to 25% <br />maximum of the wall area and allowed to be unprotected. Openings in walls less than <br />3' from the property line are prohibited. The City of Paris, subdivision set back <br />requirements will not allow a residence to be built in closer than 5' from the lot line. <br />Therefore, this change will not affect residential building projects. <br />3. 2003 Section R303.6.1 required the control for the mandatory stairway illumination to <br />be accessible at the top and bottom of the stairway without traversing any steps. 2006 <br />Section R303.6.1 deletes the language about not having to traverse any stairs and <br />clarifies that wall switches are only required at top and bottom floor levels when the <br />stair has six or more risers. This now corresponds with the National Electrical Code. <br />4. Section R308.4, exception #4 has been reworded to clarify that approved safety <br />glazing shall be provided in a wall that is perpendicular to the plane of a door if the <br />102 <br />