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Steel Strong-Wall® Shearwalls: Two-Story Stacked on Concrete Foundations

Simpson Strong-Tie offers a complete stacked-wall solution for two-story applications. This Steel Strong-Wall® Shearwall option combines simplified installation with superior performance.

  • Some of the highest loads in the industry, and design procedures that account for cumulative overturning, see Cumulative Overturning for more information.
  • Complete concrete-anchorage designs for two-story applications (foundation design by Designer)
  • No bearing plates to install, walls can now be placed flush against a corner.
  • Uses the same anchor bolt template as single-story installation.
  • Compression loads transferred by nut/rod – reducing wood crushing under load.

Complete kit available to simplify the connection between the walls.

See Installation Information.

025a-2014
Two-Story Stacked Installation

U.S. Patent 8,281,551; 8,689,518
Canadian Patent 2,489,845

Two-Story Stacked Wall Product Data - Bottom Walls
Model No. W (in.) H (in.) T (in.) Anchor Bolts Number of Screws in Top of Wall
Qty. Dia. (in.)
SSW15x8-STK 15 93 1/4 3 1/2 2 1 6
SSW18x8-STK 18 93 1/4 3 1/2 2 1 9
SSW21x8-STK 21 93 1/4 3 1/2 2 1 12
SSW24x8-STK 24 93 1/4 3 1/2 2 1 14
SSW15x9-STK 15 105 1/4 3 1/2 2 1 6
SSW18x9-STK 18 105 1/4 3 1/2 2 1 9
SSW21x9-STK 21 105 1/4 3 1/2 2 1 12
SSW24x9-STK 24 105 1/4 3 1/2 2 1 14
SSW15x10-STK 15 117 1/4 3 1/2 2 1 6
SSW18x10-STK 18 117 1/4 3 1/2 2 1 9
SSW21x10-STK 21 117 1/4 3 1/2 2 1 12
SSW24x10-STK 24 117 1/4 3 1/2 2 1 14
SSW15x11-STK 15 129 1/4 5 1/2 2 1 6
SSW18x11-STK 18 129 1/4 5 1/2 2 1 9
SSW21x11-STK 21 129 1/4 5 1/2 2 1 12
SSW24x11-STK 24 129 1/4 5 1/2 2 1 14
SSW15x12-STK 15 141 1/4 5 1/2 2 1 6
SSW18x12-STK 18 141 1/4 5 1/2 2 1 9
SSW21x12-STK 21 141 1/4 5 1/2 2 1 12
SSW24x12-STK 24 141 1/4 5 1/2 2 1 14
SSW18x13-STK 18 153 1/4 5 1/2 2 1 9
SSW21x13-STK 21 153 1/4 5 1/2 2 1 12
SSW24x13-STK 24 153 1/4 5 1/2 2 1 14
  1. See Standard Application on Concrete Foundations for product data on top walls.

Product Information

Material

Vertical Panel - 10 gauge

Finish

Vertical Panel - Galvanized; Top and Base Plates - Simpson Strong-Tie gray paint

Naming Legend

Top Wall

025a-2014-1

Bottom Wall

025b-2014

Suggested Example Specification: SSW18x8 over SSW18x10-STK

Wall Profiles

Pre-attached wood studs are 2x4 for walls 7' - 10' tall, and 2x6 for walls 11' - 13' tall.

010c-SSW12-2014
SSW12
010d-SSW15-2014

SSW15

010e-SSW15_2-2014

SSW15

010f-SSW18-2014
SSW18
010g-SSW18_2-2014
SSW18
010h-SSW21-2014
SSW21
010i-SSW21_2-2014
SSW21
010j-SSW24-2014
SSW24
010k-SSW24_2-2014
SSW24

Load Tables

Allowable Shear & Drift Values

Anchor Tension Equations

Design Example

Steel Strong-Wall Two-Story Design Example

Code Reports

ICC-ES ESR-1679

City of L.A. RR 25625

State of Florida FL5113

Catalog Page

C-L-SW14 (Strong-Wall Shearwalls), pages 25-28

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