We use cookies on this site to enhance your user experience. By clicking "I AGREE" below, you are giving your consent for us to set cookies. Privacy Policy

text.skipToContent text.skipToNavigation

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

Order free catalogs by mail