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MAB Mudsill Anchor

The MAB is a mudsill anchor with the design flexibility to anchor the mudsill to concrete block, poured walls or slab foundations. Because of its unique design, the MAB can eliminate certain problems associated with misplaced anchor bolts.

Key Features

  • Suitable for stem wall, concrete block or slab foundations
  • One-piece design, so there are no nuts and washers to lose
  • An alternative to anchor bolts


  • 18 gauge


  • Galvanized or ZMAX® coating; see Corrosion Information


  • Use all specified fasteners; see General Notes
  • CMU shall have a minimum f'm = 1,500 psi and concrete shall have a minimum f'c = 2,500 psi
  • Not for use where a horizontal cold joint exists between the slab and foundation wall or footing beneath, unless provisions are made to transfer the load
  • Not for use in slabs poured over foundation walls formed of concrete block or with brick and 4" masonry block stem walls

Related Literature

Product Information Table

Fastener Production Information and Stuff & Things
Model No. Ga. Coating/Material Packaging Qty.
MAB15 18 Zinc Galvanized, G90 1
MAB15Z 18 ZMAX® 1

Load Tables

    These products are available with additional corrosion protection.

MAB15 Mudsill Anchors Load  Table
  1. Loads have been increased for wind or earthquake loading, with no further increase allowed. Reduce where other loads govern.
  2. For uplift loads, provide attachment from mudsill to building's structural components to prevent cross-grain bending.
  3. For concrete stem wall applications, allowable loads are based on a minimum concrete stem wall width of 6".
  4. Fasteners: Nail dimensions in the table are listed diameter by length. For additional information, see Fastener Types and Sizes Specified for Simpson Strong-Tie Connectors.

Prescriptive Anchor Spacing

    These products are available with additional corrosion protection.

Prescriptive Anchor Spacing
  1. "Prescriptive" denotes designs per the IRC or conventional provisions of the IBC for wind speeds 140 mph or less, or for Seismic Design Category D and less (SDC E and less in IBC).
  2. Spacing is based on parallel-to-plate load direction only.
  3. Place anchors not more than 12" from the end of sill and splices per code.
  4. Concrete shall have a minimum compressive strength of f'c = 2,500 psi.
  5. Grout-filled CMU (GFCMU) shall have a minimum compressive strength of f'm = 1,500 psi.
  6. Spacings apply to DF, SP, and HF sill plates.
  7. For concrete stemwall applications, the minimum concrete stemwall width is 6".

Code Reports & Compliance