The Simpson MASAP Mudsill Anchor for Panelized Forms is a 16-gauge G90 galvanized steel anchor built as a high-capacity alternative to traditional anchor bolts in panelized concrete form applications. Designed to work with 2x, double-2x, and 3x mudsills as a replacement for 5/8-in. and 1/2-in. mudsill anchor bolts, the MASAP eliminates the need for 3-in. square plate washers in seismic design and, in some cases, delivers load capacities that meet or exceed the parallel- and perpendicular-to-plate shear capacity of other cast-in-place anchors. Its flat profile and form-attachment design make it a practical solution for prefabricated wall panel construction where speed, accuracy, and structural reliability all matter.

Key Features

• Attaches directly to the concrete form - simplifies installation and eliminates the extra steps required when setting traditional anchor bolts.
• No drilling of plates or alignment of holes required - cuts labor time on the job site and removes a common source of installation error.
• Flat anchor profile - prevents interference with prefabricated wall panels, reducing the need for field modifications during assembly.
• Eliminates the need to notch studs - avoids the structural compromise and added labor that result when anchor bolts are placed in conflicting positions.
• Reduces the risk of missing or misplaced anchor bolts - lowers the likelihood of costly retrofits after the concrete is poured and forms are stripped.
• Made from 16-gauge steel - provides a sturdy, reliable connection with consistent dimensional accuracy across installations.
• G90 galvanized finish - delivers enhanced corrosion resistance for long-term performance in demanding construction environments.

Why This Product

• Built specifically for panelized form work - unlike the standard MASA, the MASAP is engineered for panelized concrete forms, making it the right tool for prefabricated and modular wall construction where a flat, form-friendly profile is essential.
• Replaces anchor bolts and plate washers in one step - by serving as an alternative to 5/8-in. and 1/2-in. mudsill anchor bolts and eliminating the need for 3-in. square plate washers in seismic design, the MASAP simplifies the hardware list and speeds up the overall mudsill anchoring process.
• Reduces expensive field corrections - the form-attached installation method lowers the chance of misplaced anchors, which means fewer retrofits, less rework, and more predictable project timelines.
• Backed by Simpson engineering and domestic production - manufactured to consistent quality standards with G90 galvanized protection, the MASAP is a dependable choice for residential and light commercial mudsill connections that demand both strength and corrosion resistance.

Specifications

• Model Number: MASAP
• Gauge: 16
• Coating: Zinc Galvanized, G90
• Finish: Zinc Galvanized, G90
• Installation Fasteners: 0.148 in. x 1-1/2 in. nails (sold separately)
• Country of Origin: United States

Approved Applications

• Panelized concrete form installations requiring mudsill anchoring
• 2x, double-2x, and 3x mudsill connections as an alternative to 5/8-in. and 1/2-in. anchor bolts
• Seismic design applications requiring elimination of 3-in. square plate washers
• Prefabricated wall panel construction where flat anchor profile is required

Frequently Asked Questions

What is the difference between the MASAP and the standard MASA?

Both are versions of the MASA mudsill anchor. The standard MASA is designed for installation on standard concrete forms, while the MASAP is specifically designed for use with panelized forms. Both provide a time-saving alternative to traditional anchor bolts with strong load-carrying capacity.

What mudsill sizes is the MASAP compatible with?

The MASAP is designed as an alternative to 5/8-in. and 1/2-in. mudsill anchor bolts and is compatible with 2x, double-2x, and 3x mudsills.

Does the MASAP eliminate the need for plate washers in seismic design?

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

What fasteners are required to install the MASAP?

The MASAP should be installed with 0.148 in. x 1-1/2 in. nails. Its design allows it to attach easily to the inside of a panelized form without the labor costs involved in drilling plates and aligning holes.