The Simpson MAB15 Mudsill Anchor is a one-piece, 18-gauge steel connector designed to anchor the mudsill to concrete block, poured walls, or slab foundations - offering a practical, flexible alternative to traditional anchor bolts. Its unique design mounts easily on forms, streamlines finishing, and eliminates the common jobsite frustration of misplaced anchor bolts or lost hardware. Finished in G90 zinc galvanizing for extra corrosion resistance, the MAB15 is built to perform reliably in foundation environments where moisture exposure is a constant concern.

Key Features

• One-piece steel construction - no separate nuts or washers means fewer loose parts to track and a faster, cleaner installation process
• Compatible with nominal sill sizes 2x4 through 2x12 - supports a wide range of framing lumber dimensions, giving contractors flexibility across multiple project types
• Mounts directly on forms - simplifies placement and makes concrete finishing easier compared to setting traditional anchor bolts
• Suitable for stemwall and slab foundations - one anchor solution covers the most common residential and light commercial foundation types
• 18-gauge steel with G90 zinc galvanized finish - provides a durable, corrosion-resistant connection built to hold up in below-grade and moisture-prone conditions
• Installs with 10d x 1-1/2 in. nails - uses standard fasteners that are already on site, reducing the need for specialty hardware

Why This Product

• Eliminates anchor bolt headaches - the MAB15 removes the guesswork from mudsill connections by replacing anchor bolts with a form-mounted anchor that goes exactly where you need it, every time
• One product, multiple foundation types - whether the job calls for a poured concrete wall, concrete block foundation, or slab, this single mudsill anchor handles all three applications without swapping hardware
• Built-in corrosion protection from Simpson - the G90 galvanized coating is specifically suited for foundation-level use where ground moisture and humidity can degrade unprotected steel over time
• Broad lumber compatibility saves planning time - support for 2x4 through 2x12 nominal sill sizes means the MAB15 works across a wide variety of framing scenarios without requiring a different anchor for each lumber size

Specifications

• Model Number: MAB15
• Gauge: 18
• Coating / Finish: Zinc Galvanized, G90
• Member Size: 2x4, 2x6, 2x8, 2x10, 2x12
• Install With: 10d x 1-1/2 in. nails
• Country of Origin: United States

Approved Applications

• Anchoring mudsill to poured concrete walls
• Anchoring mudsill to concrete block (CMU) foundations
• Anchoring mudsill to slab foundations
• Stemwall foundation connections

Frequently Asked Questions

What is the MAB15 mudsill anchor used for?

The MAB15 is used to anchor the mudsill to concrete block, poured walls, or slab foundations. It serves as a practical alternative to traditional anchor bolts, offering installation flexibility and a one-piece design that eliminates the need for separate nuts and washers.

What size lumber is the MAB15 compatible with?

The MAB15 is compatible with nominal sill sizes of 2x4, 2x6, 2x8, 2x10, and 2x12 lumber.

What fasteners are required to install the MAB15?

The MAB15 should be installed with 10d x 1-1/2 in. nails.

Why is the MAB15 galvanized, and what does G90 mean?

The MAB15 is coated with a G90 zinc galvanized finish to provide extra corrosion resistance. G90 refers to a galvanizing standard that indicates the weight of zinc coating applied to the steel, making it well-suited for use in foundation applications where moisture exposure is a concern.