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LMAZ/MAB/MASB Mudsill Anchors

LMAZ/MAB/MASB

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Mudsill anchors provide an alternative to anchor bolts. They easily mount on forms and make finishing easier. The unique design provides installation flexibility, eliminating problems with misplaced anchor bolts. Suitable for stemwall or slab foundations, mudsill anchors are one piece so there are no more nuts and washers to lose.

LMAZ — an economical replacement for 1/2" sill plate anchor bolts
MAB/MASB — anchors mudsill to concrete block, poured walls or slab foundations

Material

  • LMAZ, MAB — 18 gauge; MASB — 16 gauge

Finish

  • MAB, MASB — galvanized (also available in ZMAX® coating); LMAZ — ZMAX only. See Corrosion Information.

Installation

  • Use all specified fasteners; see General Notes.
  • LMAZ/MAB:
    • CMU shall have a minimum f'm = 1,500 psi and concrete shall have a minimum f'c = 2,000 psi.
    • Not for use where a horizontal cold joint exists between the slab and foundation wall or footing beneath, unless provisions are made to transfer the load.
    • Not for use in slabs poured over foundation walls formed of concrete block or with brick and 4" masonry block stemwalls.
  • MASB:
    • Fill CMU cell with concrete grout first, then place MASB into the grouted cell and adjust into position. Attach mudsill to anchor only after the concrete grout cures.
    • CMU shall have a minimum f'm = 1,500 psi.
    • The MASB mudsill anchors were tested in standard 8" CMU.

Related Literature

Product Information Tables

Prescriptive Anchor Spacing

    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.

Prescriptive Anchor Spacing
  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. Spacing is based on parallel-to-plate load direction only.
  3. Place anchors not more than 12" from the end of sill and splices per code.
  4. Concrete shall have a minimum compressive strength of f'c = 2,500 psi.
  5. Grout-filled CMU (GFCMU) shall have a minimum compressive strength of f'm = 1,500 psi.
  6. Spacings apply to DF, SP, and HF sill plates.

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.

LMAZ/MAB/MASB Mudsill Anchors Load  Table
  1. Loads have been increased for wind or earthquake loading, with no further increase allowed. Reduce where other loads govern.
  2. For uplift loads, provide attachment from mudsill to building's structural components to prevent cross-grain bending.
  3. LMAZ installed attached to the stud has no load reduction for parallel and perpendicular loads and an uplift of 600 lb. for LMA4 and 835 lb. for LMA6.
  4. For concrete stem wall applications, allowable loads are based on a minimum concrete stem wall width of 6".
  5. Uplift loads do not apply to MAB installed on 2x8, 2x10, or 2x12 sill plates.
  6. Fasteners: Nail dimensions in the table are listed diameter by length. For additional information, see Fastener Types and Sizes Specified for Simpson Strong-Tie Connectors.

Code Reports

Part IAPMO UES ER ICC-ES ESR City of Los Angeles State of Florida
LMA4ZNo evaluation report listing.
LMA6 No evaluation report listing.
LMA6ZNo evaluation report listing.
MABSee specific model numbers for code listings.
MAB15 ER-417
MAB15Z ER-417
MAB23 ER-417
MAB23Z ER-417
MABZ No evaluation report listing.
MASB ER-417

Drawings

Part Orthographic Perspective
LMA4Z
LMA4Z Front View
DWG DXF
LMA4Z Left View
DWG DXF
LMA4Z Right View
DWG DXF
High Wind Resistant Construction Detail D54: Sill Plate to Foundation - HWRC D54 Sill Plate to Foundation
DWG DXF
LMA4Z Installed Perspective View
DWG DXF
LMA6None None
LMA6Z
LMA6Z Front View
DWG DXF
LMA6Z Left View
DWG DXF
LMA6Z Right View
DWG DXF
None
MABNone None
MAB15
MAB15 Front View
DWG DXF
MAB15 Left View
DWG DXF
MAB15 Right View
DWG DXF
MAB15 Top View
DWG DXF
None
MAB15Z
MAB15 Front View
DWG DXF
MAB15 Left View
DWG DXF
MAB15 Right View
DWG DXF
MAB15 Top View
DWG DXF
None
MAB23None None
MAB23ZNone None
MABZNone None
MASB
MASB Front View
DWG DXF
MASB Left View
DWG DXF
MASB Right View
DWG DXF
MASB Top View
DWG DXF
MASB Installed Perspective View
DWG DXF
MASB Installed Perspective View - Rim Joist
DWG DXF