Issue link: http://alpine.uberflip.com/i/221331
TOP MOUNT HANGERS Onto Wood I-Joists . . . The bent angles forming the hanger support are limited to 7 ga. Onto Glu-lam or Heavy Timber Beams . . . Backing blocks are usually required when the wood I-joist is a support member. q The maximum size nail permitted into the edge or face of the joist's top flange is limited to a 10d (9 ga.), with a length of 1¹⁄₂" to prevent splitting. q Nailing into the face and top of the glu-lam or heavy timber beams is limited to that which prevents splitting of the support member. Onto Laminated Veneer Lumber (LVL) or Dimension Lumber . . . onto Nailers . . . q Nailing into the narrow face of LVL/Laminated Veneer Lumber (up to 1³⁄₄" thickness), PSL/Parallel Strand Lumber (Parallam®) or dimension lumber (2x_), headers and beams is limited to 16d (8 ga.) or smaller nails. (Consult the engineered wood beam manufacturer.) q For 2x_ nailers measuring 1¹⁄₂" thick, the top flange nails are limited to 10d (9 ga.) by 1¹⁄₂" long. q Nailing on 3x_ or 4 x_ nailers is limited to 20d (6 ga.) by 2 1/2" long or smaller nailers. 2x_ Nailers 3x_ or 4x_ Nailers FACE MOUNT HANGERS Onto Glu-lam or Heavy Timber Beams . . . Onto Laminated Veneer Lumber (LVL) or Dimensional Lumber . . . q Nailing into the face of glu-lam or heavy timber beams is limited to what prevents splitting of the wood support member. q Nailing into the wide face of LVL or PSL (up to 1³⁄₄" thickness) or dimensional lumber (2x_), headers and beams is limited to 20d (6 ga.) or smaller nails. onto Wood I-Joists . . . The first nail into the web area of the support joist should be positioned high enough (2¹⁄₂"±). 32 q The maximum size in the web area of the support joist is limited to 16d (8 ga.) to prevent damage to the support joists, web material and splitting of the backer block material. q Backing blocks are required on both sides of the supporting members. q Nails must fully penetrate the joist web. Minimum length 1¹⁄₂" widths to 1³⁄₄" 2¹⁄₂" widths to 3¹⁄₂" Maximum size 16d To Design a Quality Floor System 1. Using a deeper joist will reduce deflection. 2. Load sharing will be improved by using thicker floor sheathing and/or reducing on-center spacing of joists. 3. Improved floor stiffness and prevention of floor squeaking will be achieved through use of adhesives to permanently bond sheathing to the joist and use of screws rather than nails. 4. Ceilings which are directly applied, bridging, bottom chord stripping or full depth blocking will improve floor design. 5. Critical concerns are quality workmanship in the field and proper storage of construction materials before use. The job also must have full joist bearing, level supports, floor sheathing properly installed and care in use and installation of fasteners.