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MASA Mudsill Anchor

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MASA
MASA
MASA Illustration
MASA Illustration

MASA mudsill anchors provide a time‑saving alternative to cast‑in‑place anchor bolts on 45mm post-installed bottom plates. Designed to install on the formwork before the pour, they simplify concrete finishing and can easily adapt to timber bottom plate interface.

Please check the Corrosion Information to see if it is suitable for your application.

Material

Carbon Steel 1.6mm thick

Finish

ZMAX® Galvanised

Features & Benefits
  • Attaches easily to the concrete formwork
  • Stays out of the way until needed, making slab finishing easier
  • Eliminates the need to pre‑drill bottom plates for anchor bolts
  • Adapts to timber stud placement with two installation scenarios
Installation
  • Use all specified fasteners 
  • Concrete shall have a minimum f’c = 17MPa
  • Spalling—Full loads apply for spalls up to a maximum height of 32mm and a maximum depth of 22mm. Any exposed portion of the mudsill anchor must be protected against possible corrosion.
  • For prescriptive anchor spacing refer to table
  • Minimum MASA end distance is 100mm and minimum centre‑to‑centre spacing is 200mm for full load
  • For continuous load path, MASA should be installed on the same side of wall as uplift connectors
Model No. Table

Model No.

Bottom Plate Size (mm)

Fasteners
(No. – Length x Dia., mm)

Design Capacity (kN)

Sides

Top

Uplift
k1 = 1.14

F1
k1 = 1.14

F2
k1 = 1.14

STANDARD INSTALLATION

MASA

90 x 45, 140 x 45

3 – 38 x 3.75

6 – 38 x 3.75

5.67

6.39

2.26
  1. Design Capacity is the lesser of (1) the Characteristic Capacity multiplied by the NZ Strength Reduction Factor (φ), and applicable the k modification factors following NZS 3603 and (2) the Serviceability Capacity which is the load at 3.2mm joint slip, which includes fastener slip and mudsill anchor deformation. Design Capacity is the minimum of test data and structural joint calculation.
  2. For Australia, the Capacity Factor (φ) is 0.85 for nails and screws for structural joints in a Category 1 application. Reduce tabulated values where other Category applications govern. For NZ, the Strength Reduction Factor (φ) is 0.80 for nails in lateral loading.
  3. Duration of Load Factor (k1) is as shown. Reduce Duration of Load Factor where applicable. Capacities may not be increased.
  4. Timber species for joint design is seasoned Radiata Pine, which is Australia Joint Group JD4 per AS 1720.1 Table H2.4 and New Zealand Joint Group J5 per NZS 3603 Table 4.1.
  5. Minimum normal class concrete strength grade shall be 17 MPa.
  6. Design Capacity based on a minimum concrete wall width of 150mm.
  7. For simultaneous loads in more than one direction, the connector must be evaluated by an engineer.

 

Brochures & Catalogues

Brochures and Catalogues

PDF icon Flyer - MASA Mudsill Anchor
Installation Guides

Installation Guides

PDF icon MASA Installation Guides
Technical Data & Docs

Technical Data Sheets

PDF icon Technical Data Sheet - MASA

Report

PDF icon COLA-RR-25851

Report Links

ESR-2555
FL13326

Warranty

Warranty

CAD Library

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PDF icon MASA_Detail_Standard.pdf

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Alternative Products

Alternative Products

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VT-HP

VT-HP High Performance Chemical Anchor

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AT-HP BLUE

AT-HP BLUE Fast Cure Chemical Anchor

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HTT4

HTT Tension Tie & Holdown

Simpson Strong‑Tie offers a wide variety of holdown devices designed and tested to address many applications and load demands.

Inspiration

Inspiration

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Request a Demo/Sample*

Experience the innovation of Simpson Strong-Tie products and how we can help you build safer, stronger structures. Please fill out your details and submit the form below. We’ll be in touch to provide you a demo and/or send you samples*.

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