The Simpson MASA Mudsill Anchor for Standard Forms is a 16-gauge, G90 galvanized steel anchor engineered as a greater load-carrying capacity alternative to traditional 5/8-in. and 1/2-in. mudsill anchor bolts on 2x, double-2x, and 3x mudsills. Designed to attach directly to standard concrete forms before the pour, the MASA lays flat on the form board and eliminates the need for 3-in. square plate washers in seismic design - delivering a streamlined, code-conscious connection solution for residential and light commercial framing applications. In some cases, its load capacities meet or exceed the parallel and perpendicular to plate shear capacity of other cast-in-place anchors, making it a reliable choice wherever mudsill anchorage is required.

Key Features

• Attaches easily to the concrete form for quick installation - reduces time spent on anchor placement during the forming stage, keeping projects on schedule.
• Lays flat on the form board with no protruding anchor bolt - eliminates the need to finish around a bolt stub, resulting in a cleaner concrete surface and less post-pour cleanup.
• No drilling of plates or aligning of holes required - cuts labor costs and removes a common source of installation error on the job site.
• Flat profile prevents modification in prefabricated walls - preserves wall assembly integrity and reduces callbacks caused by field alterations.
• Eliminates the need to notch studs - anchor placement no longer conflicts with stud layout, protecting structural continuity in the wall framing.
• Reduces the risk of missing or misplaced anchors requiring retrofit - the form-mounted installation method promotes accurate, consistent anchor positioning before the concrete is poured.
• Minimum 4-in. end distance and 8-in. center-to-center spacing for full load capacity - clear spacing guidelines help installers maximize allowable loads and stay within design requirements.
• Made from 16-gauge steel - provides the structural strength needed to meet demanding shear and uplift load requirements in mudsill connections.
• G90 galvanized finish - offers enhanced corrosion resistance suited for concrete-contact and exterior framing environments where moisture exposure is a concern.

Why This Product

• A faster, cleaner alternative to anchor bolts - by attaching to the form board before the pour and laying completely flat, the MASA eliminates the finishing work, stud notching, and plate-drilling labor that traditional cast-in-place anchor bolts require.
• Seismic design ready without extra hardware - the MASA removes the need for 3-in. square plate washers in seismic applications, simplifying the anchor schedule and reducing material costs on projects in high-seismic zones.
• High load performance across common mudsill configurations - engineered to serve as a greater load-carrying capacity alternative for both 1/2-in. and 5/8-in. anchor bolt applications on 2x, double-2x, and 3x mudsills, with capacities that in some cases meet or exceed other cast-in-place anchor solutions.
• Built-in quality assurance from Simpson - G90 galvanized, 16-gauge construction and a form-mounted installation method together reduce the chance of retrofit work caused by missing or incorrectly placed anchors, giving contractors greater confidence from pour to frame-up.

Specifications

• Model No.: MASA
• Gauge: 16
• Coating: Zinc Galvanized, G90
• Finish: Zinc Galvanized, G90
• Install With: 0.148 in. x 1-1/2 in. nails
• Country of Origin: United States

Frequently Asked Questions

What mudsill sizes is the MASA anchor compatible with?

The MASA anchor is designed as a greater load-carrying capacity alternative for 5/8-in. and 1/2-in. mudsill anchor bolts on 2x, double-2x, and 3x mudsills.

Does the MASA anchor eliminate the need for square plate washers in seismic design?

Yes. The MASA eliminates the need for 3-in. square plate washers for seismic design and, in some cases, has load capacities that meet or exceed the parallel and perpendicular to plate shear capacity of other cast-in-place anchors.

What fasteners are used to install the MASA anchor?

The MASA anchor is installed with 0.148 in. x 1-1/2 in. nails, which secure it to the concrete form board prior to the concrete pour.

What is the difference between the MASA and the MASAP?

Two versions are available - the standard MASA is designed for installation on standard forms, while the MASAP is designed for use with panelized forms.