The Simpson MASA Mudsill Anchor is a time-saving alternative to traditional anchor bolts, engineered to deliver even greater load-carrying capacity for 5/8-in. and 1/2-in. mudsill anchor bolt applications on 2x, double-2x, and 3x mudsills. Its flat, form-mounted design streamlines foundation framing by eliminating the drilling, aligning, and notching work that comes with conventional cast-in-place anchor bolts. Built from 16-gauge steel with a G90 zinc galvanized finish, this mudsill anchor also eliminates the need for 3-in. square plate washers in seismic design, and in many applications its load capacities meet or exceed the parallel- and perpendicular-to-plate shear capacity of other cast-in-place anchors. The standard MASA model is specifically designed for use on standard concrete forms, making it the right choice for high-volume residential and light commercial foundation framing where speed and placement accuracy matter.

Key Features

• Attaches directly to the concrete form - installs quickly without the setup time required by conventional anchor bolt methods, keeping crews moving on the job.
• Flat profile lays flush on the form board - no anchor bolt protrudes above the form, so concrete finishing around hardware is eliminated entirely.
• No drilling plates or aligning holes required - removes a tedious labor step, reducing installation time and the associated labor cost on every pour.
• Flat design is prefabricated-wall friendly - the low-profile form factor reduces the risk of unintended modification during prefabricated or panelized wall construction.
• Eliminates the need to notch studs - because the anchor does not project into stud bays at conflict points, framing integrity is preserved without field modifications.
• Reduces costly retrofit work - precise, form-attached placement lowers the chance of missing or misplaced anchors that would otherwise require expensive after-pour corrections.
• 16-gauge steel construction - provides the structural thickness needed to meet or exceed load capacities required for mudsill-to-foundation connections in both standard and seismic applications.
• G90 zinc galvanized finish - delivers an elevated level of corrosion resistance suitable for concrete-contact and exterior foundation environments.

Why This Product

• Seismic design made simpler - the MASA eliminates the need for 3-in. square plate washers in seismic applications, reducing material costs and one more step from the installation sequence without sacrificing code-required performance.
• Load performance that competes with cast-in-place anchors - in many applications, the MASA meets or exceeds the parallel- and perpendicular-to-plate shear capacity of other cast-in-place anchor solutions, giving contractors a faster method without a load capacity trade-off.
• Fewer field errors on high-volume pours - because the anchor is fixed to the form before the pour, the risk of misplaced or missing anchor bolts is significantly reduced, sparing crews from time-consuming and expensive retrofit anchoring after the concrete has set.
• Built for the pace of production framing - from eliminating plate drilling to removing the need to notch studs, every design detail of the MASA is aimed at cutting non-productive labor steps on residential and light commercial foundation work, where anchor placement speed and accuracy directly affect schedule.

Specifications

• Model Number: MASA-B
• Quantity: 2,500 per bulk pack
• Gauge: 16
• Coating / Finish: Zinc Galvanized, G90
• Compatible Mudsill Sizes: 2x, double-2x, and 3x mudsills
• Compatible Anchor Bolt Sizes: 5/8-in. and 1/2-in. mudsill anchor bolts
• Minimum End Distance: 4 in.
• Minimum Center-to-Center Spacing: 8 in. for full load
• Form Type: Standard forms (use MASAP for panelized forms)
• Installation Fasteners: 0.148 in. x 1-1/2 in. nails (sold separately)
• Country of Origin: United States

Approved Applications

• Mudsill-to-foundation anchoring on standard concrete forms
• Replacement for 5/8-in. and 1/2-in. mudsill anchor bolts
• Seismic design applications where 3-in. square plate washers would otherwise be required
• 2x, double-2x, and 3x mudsill assemblies
• Prefabricated wall panel foundation connections
• High-volume residential and light commercial foundation framing