MASA/MASAP Mudsill Anchors

Mudsill Anchors

This product's information may differ depending on the category of use. You are currently viewing details related to Mudsill Anchors. You can also view product information related to the category: Concrete Connectors for Cold-Formed Steel Construction

Mudsill anchors have always been a time-saving alternative to anchor bolts, and the MASA anchors provide an even greater load-carrying capacity alternative for 5/8" and 1/2" mudsill anchor bolts on 2x, double-2x and 3x mudsills. It also eliminates the need for 3" 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. Two versions of the MASA are available — the standard MASA for installation on standard forms and the MASAP for panelized forms.

The MASA and MASAP are code listed by ICC-ES under the 2012 and 2015 IBC^® and IRC^®.

Material

• 16 gauge

Finish

• Galvanized. All available in ZMAX^® coating. See Corrosion Information.

Installation

• Use all specified fasteners; see General Notes.
• MASA/MASAP
  - Concrete shall have a minimum f'_c = 2500 psi.
  - Spalling — Full loads apply for spalls up to a maximum height of 1 1/4" and a maximum depth of 7/8". Any exposed portion of the mudsill anchor must be protected against possible corrosion.
  - For prescriptive anchor spacing refer to the table below.
  - Testing shows that these mudsill anchors can be used in lieu of code-required anchor bolts and square washer in high seismic zones. Refer to flier Easier Mudsill Anchoring: Cast-in-Place Mudsill Anchor (F-MASA) for additional information.
  - Minimum MASA end distance is 4" and minimum center-to-center spacing is 8" for full load.
  - For continuous load path, MASA should be installed on the same side of wall as uplift connectors.
  - For installation in severe corrosion environments, refer to General Corrosion Risks for additional considerations.

Related Links

Wood Construction

• Wood Construction Connectors Technical and Installation Notes
• General Notes

Cold-Formed Steel Construction

• Cold-Formed Steel Connectors Technical and Installation Notes
• General Notes

Corrosion Information

• General Corrosion Information
• General Corrosion Risks
• Corrosion-Resistant Products

Catalog Pages

• C-C-2017 (Wood Construction Connectors), pages 48–49

Related Literature

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Product Information Tables

Prescriptive Spacing for MASA/MASAP to Replace Sill Anchor Bolts

1. "Prescriptive" denotes designs per the IRC or conventional provisions of the IBC for wind speeds 100 mph or less, or for Seismic Design Category D and less (SDC E and less in IBC).
2. Detached one- and two-family dwellings in SDC C may use the "Wind & SDC A&B" spacing.
3. Spacing is based on the parallel to plate load direction for MASA Standard installation only.
4. 5/8" diameter AB required in SDC E.
5. When replacing 1/2" -diameter sill bolts use (7) 10d x 1 1/2" nails for standard installation. One out of three MASAs (33%) may be installed in One-Leg-Up installation along a wall line.
6. When replacing 5/8" -diameter sill bolts use (9) 10d x 1 1/2" nails for standard installation. One out of five MASAs (20%) may be installed in One-Leg-Up installation along a wall line.
7. Per Section 1613 of the 2012/2015 IBC, detached one- and two-family dwellings in SDC C may use the "Wind and SDC A&B" spacing.

Load Tables

    These products are available with additional corrosion protection. Additional products on this page may also be available with this option, check with Simpson Strong-Tie for details.

1. Loads are based on allowable stress design (ASD) and include the load duration factor C_D (with C_D = 1.6) for wind/earthquake loading. No further increase is allowed. Reduce where other loads govern.
2. Minimum concrete compression strength, f'c is 2500 psi.
3. Allowable loads are based on a minimum stemwall width of 6".
4. For simultaneous loads in more than one direction, the connector must be evaluated using the Unity Equation.
5. Per Section 1613 of the 2012/2015 IBC, detached one- and two-family dwellings in SDC C may use the "Wind and SDC A&B" allowable loads.
6. For designs under the 2012/2015 IBC, sill plate size shall comply with the shearwall requirements of the 2015 Special Design Provisions for Wind and Seismic.
7. MASA/MASAP may be installed using 7-nails when being used to replace a 1/2"-diameter sill bolt for use on a 2x mudsill. Install minimum 3-side fasteners.
8. Nails: 10d x 1 1/2" = 0.148" dia. x 1 1/2" long. See other nail sizes and information.

Code Reports