Chapter 10 Floor Framing 249 10.4.3 Nailing I-Joists Manufacturers of I-joists have specific require- ments for nailing, reinforcing, and cutting holes in their joists. The special construction techniques detailed in Figure 10-30 are typical. Special nail- ing requirements might include the following: To reduce splitting, nail joists at bearing points with two 8d nails, one on either side, no closer than 1 1/2″ from the end. The size of the nails required may vary according to the thickness of the flanges. Generally, the specifications provide for about 2″ of the nail to penetrate the second piece. Nail rim joist that is 1 3/4″ or thinner to the wood I-beam using two 8d nails, one each at top and bottom flange. Attach 2 × 4 or wider “squash” plates to the top and bottom flanges to help support bearing walls. See details A2 and B2 in Figure 10-30. 10.4.4 Rim Boards Rim boards are the framing members between the sill and the bottom of the wall fram- ing. In framing with sawn wood, the rim board may be called the rim joist, band joist, or joist header. Engineered rim boards are designed for use with I-joists. Rim boards may be made with LVL, LSL, or OSB. I-joists do not expand and con- tract with changes in their moisture content, so it is necessary to use rim boards that have similar properties. Engineered rim boards are generally available in 1″, 1 1/8″, 1 1/4″ and 1 1/2″ thicknesses and in the same depths as I-joists. Weyerhaeuser Figure 10-28. I-joists supported by a glulam girder. I-joists are constructed with solid wood chords and plywood or OSB webs. They must be placed upright during storage and transport to avoid damage. 1. Attach hanger to header or girder. 2. Slide I-joist into hanger. 3. Firmly push or snap I-joist into seat of hanger. Installing I-Joists Simpson Strong-tie Figure 10-29. Special hangers are available for installing I-joists. Copyright Goodheart-Willcox Co., Inc.
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Chapter 10 Floor Framing 249 10.4.3 Nailing I-Joists Manufacturers of I-joists have specific require- ments for nailing, reinforcing, and cutting holes in their joists. The special construction techniques detailed in Figure 10-30 are typical. Special nail- ing requirements might include the following: To reduce splitting, nail joists at bearing points with two 8d nails, one on either side, no closer than 1 1/2″ from the end. The size of the nails required may vary according to the thickness of the flanges. Generally, the specifications provide for about 2″ of the nail to penetrate the second piece. Nail rim joist that is 1 3/4″ or thinner to the wood I-beam using two 8d nails, one each at top and bottom flange. Attach 2 × 4 or wider “squash” plates to the top and bottom flanges to help support bearing walls. See details A2 and B2 in Figure 10-30. 10.4.4 Rim Boards Rim boards are the framing members between the sill and the bottom of the wall fram- ing. In framing with sawn wood, the rim board may be called the rim joist, band joist, or joist header. Engineered rim boards are designed for use with I-joists. Rim boards may be made with LVL, LSL, or OSB. I-joists do not expand and con- tract with changes in their moisture content, so it is necessary to use rim boards that have similar properties. Engineered rim boards are generally available in 1″, 1 1/8″, 1 1/4″ and 1 1/2″ thicknesses and in the same depths as I-joists. Weyerhaeuser Figure 10-28. I-joists supported by a glulam girder. I-joists are constructed with solid wood chords and plywood or OSB webs. They must be placed upright during storage and transport to avoid damage. 1. Attach hanger to header or girder. 2. Slide I-joist into hanger. 3. Firmly push or snap I-joist into seat of hanger. Installing I-Joists Simpson Strong-tie Figure 10-29. Special hangers are available for installing I-joists. Copyright Goodheart-Willcox Co., Inc.

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