A dedicated range of top-flange I-joist hangers meeting the unique needs of I-joists while offering superior performance and ease of installation.
The LT series of top-flange hangers is designed for use with wood I-joists. Installation is fast and easy. The hanger's top flange simplifies placement, and the side flanges laterally support the I-joist top flange, eliminating the need for web stiffeners. Securing the carried I-joist is simple with only one or two screws required into the bottom flange through the seat of the hanger.
Use all specified fasteners. Verify that the header can take the required fasteners specified in the table.
See General Instructions for the Installer for additional information.
LT's optional triangle nail holes may be used for increased uplift capacity. See Optional Nailing for Increased Uplift table.
For sloped joists up to 1/4:12 there is no reduction, between 1/4:12 and up to 1/2:12, tests show a 10% reduction in ultimate hanger strength. Local crushing of the bottom flange or excessive deflection may be limiting; check with joist manufacturer for specific limitations on bearing of this type.
Because these hangers are fully die-formed, they cannot be modified. However these models will normally accommodate a skew of up to 5°.
The LT hanger has locations for optional nails if additional uplift is needed. Optional uplift nailing requires the addition of properly-secured web stiffeners. See the load tables for minimum required fasteners and uplift capacities.
When I-joist is used as header, all nails must be 10d x 1 1/2".
Resistances may not be increased for short-term loading.
Uplift resistances are based on D.Fir-L, and have been increased 15% for wind or earthquake loading with no further increase allowed. Divide by 1.15 for normal loading criteria like cantilever construction. For S-P-F use 0.71 x resistance.
Applies to LVL headers made primarily from Douglas Fir or Southern Pine. For LVL made primarily from Spruce Pine Fir or similar less dense veneers, use the values found in the S-P-F column.
For l-joist flanges less than 1 1/2" thick multiply table values by a factor of 0.85.
Minimum solid header thickness to achieve LT table loads is 1 3/4".
Structural composite lumber is LVL, LSL and Parallam® PSL.
ITS optional installation requires web stiffeners installed per I-joist manufacturers recommendations.
For 16 and 18 gauge, 3 1/2" wide I-joist hangers, web stiffeners are required when the factored reaction is greater than 2330 lb. (10.36 kN).
Factored resistances have been increased 15% for wind or earthquake loading with no further increase allowed. Reduce according to the code for normal loading criteria such as in cantilever construction.
Web stiffeners are required on I-joist for additional nailing.