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MASA/MASAP Mudsill Anchors

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Description

Mudsill anchors have always been a time-saving alternative to anchor bolts, and the MASA anchors provide a great 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 allowable loads that meet or exceed the parallel- and perpendicular-to-plate shear loads 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, 2015 and 2018 IBC® and IRC®.

Key Features

  • Attaches easily to the concrete form for quick installation
  • MASA lays flat on the form board so there is no anchor bolt to finish
  • No labor costs involved in drilling plates and aligning holes
  • Flat design eliminates chances of modification in prefabricated walls
  • Eliminates the need to notch studs due the anchor bolts being placed where it will interfere
  • Reduces the chance of having to retrofit anchors because of missing or misplaced anchor bolts

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 = 2,500 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.
    – 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.
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