Page 87 of Wood Construction Connectors 2006 Catalog by Simpson Strong-Tie

88 Engineered Wood Structural Composite Lumber Connectors GENERAL CONNECTOR INSTALLATION WOOD NAILERS Nailer Too Wide The loading may cause crossgrain bending. As a general rule, the maximum allowable overhang is ², depending on nailer thickness. Correct Attachment Nailer Too Narrow A maximum mismatch of ² for normal installations is allowed. Nailer Too Thin or the wrong hanger for the application. Toe nailing causes squeaks and improper hanger installations. Do not toe nail I-joists before installing top flange or face mount hangers. DOUBLE SHEAR NAILING The nail is installed into joist and header, distributing load through two points on each nail for greater strength. TOP FLANGE HANGERS IUS INSTALLATION SEQUENCE Flush Framing Top flange configuration and thickness of top flange need to be considered for flush frame conditions. Hanger Over-Spread If the hanger is over-spread, it can raise the I-joist above the header and may cause uneven surfaces and squeaky floors. Hanger Not Plumb A hanger kicked-out from the header can cause uneven surfaces and squeaky floors. WOOD I-JOISTS SLOPED JOISTS For sloped joists up to :12 there is no reduction. For slopes greater than :12 see individual product pages or refer to technical bulletin T-WSLOPEJST. MULTIPLE JOISTS Multiple joists should be adequately connected together to act as one unit. FASTENERS Use the correct nails. Wood may split if the nails are too large. Hanger nails into flanges should not exceed 10d common (0.148 dia.), no longer than 1 ". Nails into web stiffeners should not exceed 16d commons (0.162 dia.). ECCENTRICALLY-LOADED I-JOISTS Supporting a top flange hanger may require bottom flange restraining straps, blocking or directly-applied ceiling systems to prevent rotation at the hanger location. NAIL PATTERN Attach backer block with 10-10d nails. Solid sawn backer blocks may split if a row of closelyspaced nails goes along the wood grain. For I-joist to I-joist connections, the nails should extend through backer block and web. Refer to manufacturers literature for other attachment details. I-JOIST HEADERS When supporting one I-joist from another, install backer blocks to the carrying I-joist with 10-10d nails. Check with the joist manufacturer to see if backer blocks are required on both sides. Top Flange Hanger Face Mount Hanger STEP 3 Firmly push or snap I-joist fully into the seat of the IUS. STEP 2 Slide the I-joist into the IUS until it rests above the large teardrop. STEP 1 Attach the IUS to the header TOE-NAILING

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