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Information on this page has been updated since the printing of the C-2009 catalog.
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MAS/MASA/MASAP/MASB/MASP Mudsill Anchors

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New Testing for MASA Anchors

Mudsill anchors have always been a time-saving alternative to anchor bolts, and the new MASA anchors provide even greater load-carrying capacity than our original MAS. As a result, the MASA provides an 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 2006 and 2009 IBC® and IRC® and have been tested to meet the requirements of ICC-ES acceptance criteria AC-398 for cracked and uncracked concrete. New test data is reflected in the table below.

MAS style mudsill anchors are easy to install for both the concrete and framing contractor. They are suitable for either stemwall or slab foundations and easily mount on the forms before the pour, simplifying finishing and reducing anchor mislocation problems. The MAS eliminates the need to drill the mudsill and can be installed three different ways to provide flexibility when stud placement or sheathing becomes an issue (see table below).

The new and improved MASA/P provides the installation advantages of mudsill anchors combined with the maximum allowable on-center spacing. The MASA/P provides an alternative for 5/8" and 1/2" anchor bolts on 2x and 3x sills. It eliminates the need for 3" square plate washers and, in some cases, has load capacities that meet or exceed that of other cast-in-place anchors.

The different models of mudsill anchors are designed for specific applications:

MAS/MASA - installed at the top of the form
MASP/MASAP - for panelized forms
MASB - used in concrete masonry units.

Material: 16 gauge

Finish: Galvanized, all available in ZMAX® coating. See Corrosion Information.

Installation:


top Gallery:
  roll over images below to see larger image
 
 
MASA MAS MASAP
(MASP similar)		  
 
Typical MASA Installation in Concrete
(MAS similar)		 Typical MASA/MASAP Installation on Sill Plate
(MAS/MASP similar)		 Typical MASAP Installation
in Concrete
(MASP similar)		  
 
MASB MAS/MASP Rim Joist or Blocking Installation in Concrete over Max. 1/2" Sheathing
(MASA/MASAP/ MASB similar)		 Typical MASB
Installation		  

top Load Table:See code report listings below

Table
    For SI: 1 inch = 25.4 mm, 1 pound = 4.45 N, 1 psi = 6.895 kPa
  1. Loads are based on allowable stress design (ASD) and include the load duration factor CD (with CD = 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 2006 IBC, detached one- and two-family dwellings in SDC C may use the “Wind and SDC A&B” allowable loads.
  6. In SDC D-F a 3x sill plate is required when the allowable design shearwall shear load is equal to or greater than 600 plf. If the allowable design shear load is greater than 350 plf but less than 600 plf, it is acceptable to use a 2x sill plate provided that the sill is anchored using double the number of MASA mudsill anchors required by design.
  7. MASA/P loads are based on testing procedures and calculations from ICC-ES Acceptance Criteria, AC398.
  8. Nails : 10dx1 1/2" = 0.148" dia. x 1 1/2" long. See other nail sizes and information.

topPrescriptive Anchor Spacing:

Table
  1. Place anchors not more than 12" from the end of each sill per code.
  2. Spacing is based on parallel to plate load direction only.
  3. CMU shall have a minimum f'm = 1500 psi and concrete shall have a minimum f'c = 2500 psi.
  4. Spacing applies to DF, SP, and HF 2x sill plates.
  5. For installations to rim joist or blocking, MASB spacing is 1'-10" for replacing 1/2" bolts and 1'-6" for 5/8" bolts. MAS/P and MASA/P remain the same as the table.
  6. When replacing 1/2" sill bolts use 7-10dx1 1/2" nails (minimum nailing) and when replacing 5/8" sill bolts use 9-10dx1 1/2" nails (maximum nailing).
top Alternate Mudsill Anchor Installations:
  roll over images below to see larger image
 
Alternate Installation For Inside of Wall Continuity
   
Step 1:
Attach MAS/MASA 3 1/2" from inside of form. After concrete cures, remove nails and bend straps up 90°. 		Step 2:
Place mudsill on concrete and nail MAS/MASA over mudsill.
Alternate Installation For Brick Ledges
Alternate MAS Installation for Brick Ledges
(MASA similar)

next  top Code Reports (PDFs):
Legacy Reports
  IAPMO ES ER ICC-ES ESR CITY OF LOS ANGELES STATE OF FLORIDA ICC-ES NER ICC-ES ER ICC-ES ES
MAS        NER-209 ER-5275  
MASA  ESR-2555 / ESR-2523 *          
MASAP  ESR-2555 / ESR-2523 *          
MASB          ER-5357  
MASP             



next  topDrawings: To download drawings, right-click or Ctrl-click on the link, then choose "Save Target As..."
Download the Simpson AutoCad Menu, which allows you to insert Ortho views directly into your AutoCAD drawing.

 ORTHOGRAPHIC
PERSPECTIVE
MAS MAS: DWG | DXF
MAS front view: DWG | DXF
MAS left view: DWG | DXF
MAS right view: DWG | DXF
MAS top view: DWG | DXF
High Wind-Resistant Construction D51: Sill Plate to Foundation: Alternate MAS Installation for Brick Ledges: DWG | DXF
MAS 1: DWG | DXF
MAS 2: DWG | DXF
MAS 3: DWG | DXF
MAS 4: DWG | DXF
MAS 5: DWG | DXF
MAS CFS: DWG | DXF
Sill Plate to Foundation Connections: DWG | DXF
MASA MASA: DWG | DXF
MASA front view: DWG | DXF
MASA left view: DWG | DXF
MASA right view: DWG | DXF
High Wind-Resistant Construction D50: Sill Plate to Foundation: DWG | DXF
MASA: DWG | DXF
MASAP MASAP: DWG | DXF
MASAP front view: DWG | DXF
MASAP left view: DWG | DXF
MASAP right view: DWG | DXF
MASAP: DWG | DXF
MASB MASB: DWG | DXF
MASB front view: DWG | DXF
MASB left view: DWG | DXF
MASB right view: DWG | DXF
MASB top view: DWG | DXF
MASB: DWG | DXF
MASB Rim Joist Installation: DWG | DXF
MASP MASP: DWG | DXF
MASP front view: DWG | DXF
MASP left view: DWG | DXF
None for this model

C-2009 Addendum, page 17
   
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Catalog Pages (PDFs):
Order free catalogs by mail
C-2009 (Wood Construction Connectors), page 22-page 23
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Related Categories:
Mudsill Anchors - Concrete or Masonry (Wood Construction)
High Wind Resistance (Wood Construction)
Earthquake/High Wind for Home Products (DIY)
Concrete Connectors (Cold-Formed Steel)
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Technical Bulletins (PDFs):
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Fliers (PDFs):
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