The Simpson MASBZ MASB 16-Gauge ZMAX Galvanized Masonry Mudsill Anchor from Simpson is a one-piece anchor designed to securely connect a mudsill to concrete block, poured concrete walls, or slab foundations - serving as a reliable alternative to traditional anchor bolts for both stemwall and slab foundation applications. The unique design mounts directly on forms and allows position adjustments during installation, eliminating the common frustration of misplaced anchor bolts and eliminating loose hardware like nuts and washers from the equation entirely.

Key Features

• Anchors mudsill to concrete block, poured walls, or slab foundations - gives contractors a single connector solution across multiple foundation types, reducing the need to stock different hardware for different jobs.
• One-piece construction with no nuts or washers - fewer loose components on the job site means faster installs and less risk of missing hardware holding up your work.
• Mounts on forms with adjustable positioning - lets you fine-tune placement before the concrete sets, so misalignment issues that plague traditional anchor bolt methods are no longer a concern.
• Compatible with nominal 2x4 and 2x6 sill sizes - covers the two most common mudsill dimensions used in residential and light commercial framing.
• Made from 16-gauge steel - provides the structural integrity needed for secure mudsill-to-foundation connections without unnecessary bulk.
• ZMAX galvanization offers extra corrosion resistance for exterior and treated-wood applications - the enhanced coating stands up to the harsh chemical environment created by pressure-treated lumber, where standard galvanized finishes can break down prematurely.

Why This Product

• Eliminates anchor bolt headaches - because the anchor mounts on forms and remains adjustable before the concrete cures, you avoid the costly and time-consuming problem of bolts set in the wrong location.
• Built for treated-wood and exterior conditions - ZMAX galvanization goes beyond standard corrosion protection, making this anchor a dependable choice wherever pressure-treated sill plates and outdoor exposure are part of the build.
• Streamlined installation with no loose hardware - the one-piece design means no nuts or washers to track down or lose on the job site, keeping the masonry anchor-to-mudsill connection straightforward from pour to finish.
• Versatile across foundation types - whether the project involves a concrete masonry unit stemwall, a poured concrete wall, or a slab foundation, this single anchor handles all three scenarios without substitution.

Specifications

• Model Number: MASBZ
• Gauge: 16
• Coating: ZMAX
• Finish: ZMAX
• Member Size: 2x4, 2x6
• Install With: 10d x 1-1/2 in. nails
• Country of Origin: United States

Approved Applications

• Anchoring mudsill to concrete block (CMU) foundations
• Anchoring mudsill to poured concrete walls
• Anchoring mudsill to slab foundations
• Stemwall foundation applications
• Exterior and treated-wood applications requiring enhanced corrosion resistance

Frequently Asked Questions

What is the correct installation sequence for the MASBZ mudsill anchor?

Fill the CMU cell with concrete grout first, then place the MASB into the grouted cell and adjust into position. Attach the mudsill to the anchor only after the concrete grout cures.

What sill sizes is the MASBZ compatible with?

The MASBZ is designed for nominal sill sizes of 2x4 and 2x6.

Why is the ZMAX finish important for this mudsill anchor?

ZMAX galvanization offers extra corrosion resistance, making the MASBZ suitable for exterior applications and use with treated wood - environments where standard galvanized finishes may not provide adequate protection.

What fasteners are required to install the MASBZ?

Install with 10d x 1-1/2 in. nails to attach the mudsill to the anchor after the concrete grout has fully cured.