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2007 SUPPLEMENT TO THE IRC R606.3.2 Corbel projection. The maximum projection of one unit shall not exceed one-half the height of the unit or one-third the thickness at right angles to the wall. The maximum corbeled projection beyond the face of the wall shall not exceed: 1. One-half of the wall thickness for multiwythe walls bonded by mortar or grout and wall ties or masonry headers, or 2. One-half the wythe thickness for single wythe walls, masonry -bonded hollow walls, multiwythe walls with open collar joints and veneer walls. R606.3.3 Corbeled masonry supporting floor or roof -framing members. When corbeled masonry is used to support floor or roof -framing members, the top course of the corbel shall be a header course or the top course bed joint shall have ties to the vertical wall. Section R606.4.2 Change to read as shown: (R13238-06/07) R606.4.2 Support at foundation. Cavity wall or masonry veneer construction may be supported on an 8 -inch (203 mm) foundation wall, provided the 8 -inch (203 mm) wall is corbeled with solid masonry to the width of the wall system above. The total horizontal projection of the corbel shall not exceed 2 inches (51 mm) with individual corbels projecting not more than one-third the thickness of the unit or one-half the height of the unit. The hollow space behind the corbeled masonry shall be filled with mortar or grout. Section R606.12.2.1, Table R606.12.2.1 Add new section and table to read as shown: (RB239-06/07) R606.12.2.1 Minimum length of wall without openings. Table R606.12.2.1 shall be used to determine the minimum required solid wall length without openings at each masonry exterior wall. The provided percentage of solid wall length shall only include those wall segments that are 3 feet (914 mm) or longer. The maximum clear distance between wall segments included in determining the solid wall length shall not exceed 18 feet (5486 mm). Shear wall segments required to meet the minimum wall length shall be in accordance with Section R606.12.2.2.3. TABLE R606.12.2.1 MINIMUM SOLID WALL LENGTH ALONG EXTERIOR WALL LINES MINIMUM SOLID WALL LENGTH (percent) Wall Supporting Light- Wall Supporting Story of Two Story Framed Second Story Masonry Second Story and Roof and Roof 35 Seismic Design Category One Story or Top Townhouses in C 20 Do or D 25 25 NP NP D��-mro,��rvrv, �„��, 30 ,� NP NP = Not permitted, expect with design in accordance with the International Building Code. a, For all walls, the minimum required length of solid wails shall be based on the table percent multiplied by the dimension, parallel to the wall direction under consideration, of a rectangle inscribing the overall building plan. NP Section R607.2.1.1 Change to read as shown: (RB240-06/07) R607.2.1.1 Mortar joint thickness tolerance. Mortar joint thickness for load bearing masonry shall be within the following tolerances from the specified dimensions 1. Bed joint: + 1/8 inch (3 mm). 2. Head joint: -1/4 inch (7 mm), + 3/8 inch (10 mm). 3. Collar joints: -114 inch (7 mm), + 3/8 inch (10 mm). Sections R613, R613.1 Change to read as shown: (RB244-06/07) SECTION R613 EXTERIOR WINDOWS AND DOORS R613.1 General. This section prescribes performance and construction requirements for exterior window and door systems installed in wall systems, Windows and doors shall be installed and flashed in accordance with the fenestration manufacturer's written installation instructions. Window and door openings shall be flashed in accordance with Section R703.8. Written installation instructions shall be provided by the fenestration manufacturer for each window or door. IRC -55 Coppnontoo c 2007 ICC (ALL RIGHTS RESE'RVEDy. Iicensao NJ Neil Erickson pursuant to License Awn:arcoerol with ICC No further rep ' +ructioroo at hca*/ u r or rlisInbutiorr authorized. ANY UNAUTHROr7ED REPRODUCTION OR DISTRIBUTION IS A VI0LATOON OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER