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MMLU Face-Mount Hanger for Factory-Built Structures

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The face-mount MMLU series provides installation versatility for factory-built structures. Nailing grids in the MMLU hangers replace traditional nail holes, allowing for faster installation of power-driven nails. Each hanger provides multiple nailing pattern options to enable value engineering for different loads.

Key Features

  • Versatile fastener placement enables faster installation, ideal for modular building settings
  • Designed with factory-used tools in mind
  • Built specifically for optimal fastening using a power nailer


  • MMLU26-2, MMLU28-2 —18 gauge, all others — 20 gauge


  • Galvanized


  • Nails must be installed with a powered nail tool. Face protection is required. To reduce ricochet, install nails straight through the nailing grid. Follow all safety instructions for the nail tool.
  • Adjust the nail tool pressure so nail heads are flush with the hanger and are not overdriven causing the MMLU steel to dimple.
  • Install at least one 8d x 1 1/2″ or 10d x 1 1/2″ nail into each nailing grid.
  • Install additional nails in accordance with the MMLU Installation and Load Table for increased capacity. Each header nailing grid must contain the same quantity of nails.
  • The minimum vertical center-to-center spacing of nails in the same nailing grid is 1/2″ and must not split the wood header.
  • The MMLU height (H) must equal or exceed 60% of the joist height to provide joist rotation resistance. If H is less than 60% of the joist height, provide lateral restraint to the top of the joist by other means, such as blocking, end nailing or Simpson Strong-Tie® A34 framing angles above the hanger.
  • I-joist web stiffeners or floor truss end vertical webs must be installed in the carried member when the hanger side flanges do not support the I-joist top flange or floor truss top chord.
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