MAS, TMAB Mudsill Anchors - Box of 100

MAS & TMAB Mudsill Anchors — Fast, Code-Compliant Wood-to-Concrete Anchoring

The MAS and TMAB1 mudsill anchors are galvanized steel connectors engineered to provide a faster, more economical, and secure method for anchoring wood framing to masonry or concrete. The MAS is designed for installation into concrete slabs and features a split flange that allows nailing to both the mudsill and stud, offering greater framing versatility. The TMAB1 is intended for installation into concrete slabs or poured stemwalls and includes a pre-bent base flange to ensure proper anchoring into concrete. Both anchors are suited for residential and light commercial framing contractors working with 2x4 or 2x6 mudsill applications.

Technical Specifications

The MAS split-flange design allows the anchor to be nailed to either the mudsill or directly to the stud, giving framers flexibility that standard anchor bolts do not provide. The TMAB1's pre-bent base flange ensures consistent embedment geometry in poured concrete, and its rated load capacity allows it to serve as a direct code-recognized substitution for 1/2" anchor bolts at 6' on center.

Key Features & Benefits

Split Flange Design (MAS)

The MAS split flange allows nailing to both the mudsill and the stud, providing greater framing versatility compared to single-point anchors. This dual attachment capability helps distribute load across more of the framing assembly.

Pre-Bent Base Flange (TMAB1)

The TMAB1's pre-bent base flange is engineered to assure proper anchoring geometry when cast into concrete slabs or poured stemwalls. Consistent flange positioning reduces installation error and supports rated uplift performance.

Flexible Installation Timing (MAS)

The MAS can be installed before the concrete pour by nailing to the form, or after the pour by inserting the anchor directly into fresh concrete. This flexibility accommodates different jobsite sequencing without requiring additional hardware.

Fast Nail Attachment

Only six code-spaced nails are required to complete MAS attachment to the mudsill or stud, reducing installation time on the deck. Fewer fasteners per anchor means faster cycle times across a full foundation perimeter.

Galvanized Steel Construction

Both anchors are manufactured from galvanized steel — 16ga. for the MAS and 18ga. for the TMAB — and are available in G-185 Triple Zinc or Hot-Dip Galvanized finishes for corrosion resistance in exposed concrete and masonry environments.

Anchor Bolt Substitution (TMAB1)

The TMAB1 is rated as a direct substitution for 1/2" anchor bolts at 6' on center, allowing contractors to meet code requirements without traditional cast-in-place bolt layouts. This can simplify scheduling and reduce dependency on pre-pour bolt placement.

Common Applications

Concrete Slab Mudsill Anchoring (MAS)

The MAS is designed specifically for anchoring wood mudsills to concrete slabs, with the option to install before or after the pour depending on project sequencing.

Poured Stemwall Anchoring (TMAB1)

The TMAB1 is suited for installation into poured stemwalls, with its pre-bent base flange ensuring proper embedment and load transfer from the wood framing into the concrete foundation.

Anchor Bolt Replacement

The TMAB1 can be used as a direct code substitution for 1/2" anchor bolts at 6' on center, applicable when nominal 2x4 or 2x6 mudsills are used.

Stud-to-Foundation Connection

The MAS split flange enables direct nailing to the stud as well as the mudsill, making it suitable for applications where a stud-level connection to the foundation is required.

Product Documents

• MAS / TMAB Catalog Page (PDF)
• Credit Application

Frequently Asked Questions

Q: What is the difference between the MAS and the TMAB1 mudsill anchor?
A: The MAS is a 16ga. galvanized steel anchor designed for installation into concrete slabs, featuring a split flange for nailing to both the mudsill and stud. The TMAB1 is an 18ga. galvanized steel anchor designed for installation into concrete slabs or poured stemwalls, and includes a pre-bent base flange to assure proper anchoring into concrete.

Q: What mudsill sizes are compatible with these anchors?
A: Both the MAS and TMAB1 are designed for use with nominal 2x4 or 2x6 mudsills.

Q: Can the TMAB1 replace standard anchor bolts?
A: Yes. The TMAB1 is rated as a direct substitution for 1/2" anchor bolts at 6' on center when used with a nominal 2x4 or 2x6 mudsill. When a 2x8 mudsill is used, maximum spacing is 3 feet.

Q: What are the allowable uplift loads for the MAS?
A: With a 2-nail side pattern (2 sides, 4 top), the MAS is rated at 815 lbs uplift for SYP and 703 lbs for DFL. With a 4-nail side pattern (4 sides, 2 top), both SYP and DFL ratings are 815 lbs.

Q: What are the allowable uplift loads for the TMAB1?
A: The TMAB1 (ref. MAB15) is rated at 980 lbs allowable uplift for both SYP and DFL, using a nail schedule of 6 nails on the sides and 8 nails on the top.

Q: What finish options are available, and how do I order them?
A: Both anchors are available in G-185 Triple Zinc or Hot-Dip Galvanized finishes. Availability varies — contact the supplier directly to confirm which finish is in stock.