SWAB7/8 anchor bolts were developed to provide anchorage solutions for Wood Strong-Wall Shearwalls in accordance with the provisions of ACI 318-05. This code listed anchor bolt is easy to inspect; the head is stamped with a “No Equal” symbol for identification, bolt length and bolt diameter. Available in four lengths, the SWAB7/8 provides a range of embedment options for seismic or wind solutions in cracked or uncracked concrete conditions.

Material: ASTM F1554 Gr. 36

Foundation Dimensions for Anchorage Solutions:

1. Anchorage designs conform to ACI 318 Appendix D and assume minimum f'c = 2500 psi concrete, ASTM A307 or ASTM F1554, Grade 36 anchor rods and no supplementary reinforcement. High strength anchorage design by others when required.
2. Seismic indicates Seismic Design Category C through F. Detached 1 and 2 family dwellings in SDC C may use wind anchorage solutions. Seismic anchorage designs conform to ACI 318-05 Section D.3.3.4.
3. Wind includes Seismic Design Category A and B.
4. Foundation dimensions are for anchorage only. Foundation design (size and reinforcement) by others. The Registered Design Professional may specify alternate embedment, footing size or anchor bolt.

Related Literature:

(This section is specifically about SSTB Anchor Bolts for Wood Strong-Wall. Also see the full SSTB Anchor Bolt page.)

The SSTB is designed for maximum performance as an anchor bolt for holdowns and Wood Strong-Wall® shearwalls. Extensive SSTB testing has been done to determine the design load capacity at a common application, the garage stem wall. Design loads are based on a series of five tests, with a three-times reduction factor.

Special Features :

• Rolled threads for higher tensile capacity.
• Offset angle reduces side-bursting, provides more concrete cover.
• Stamped embedment line aids installation.
• Configuration results in minimum rebar interference.

Material: ASTM A36

Finish: None. May be ordered HDG; contact Simpson Stong-Tie.

Installation:

• SSTB is used for monolithic and two-pour installations.
• Nuts and washers are not supplied with the SSTB; install standard nuts, couplers and/or washers as required. On HDG SSTB anchors, chase the threads to use standard nuts or couplers or use overtapped products in accordance with ASTM A563 (Simpson NUT7/8-OST or CNW7/8-7/8OST).

Reinforced Concrete Foundation

• Install the SSTB per plan view detail shown on this page. Install one #4 rebar 3" to 5" (may be foundation rebar not post-tension cable) from the top of the foundation.
• The SSTB does not need to be tied to the rebar.
• Minimum concrete compression strength is 2500 psi. Unless noted otherwise, no special inspection is required for foundation concrete when the structural design is based on concrete no greater than 2500 psi (UBC Section 1701.5.1 and IBC Section 1704.4).
• Unless otherwise noted, do NOT install where: (a) a horizontal cold joint exists within the embedment depth between the slab and foundation wall or footing beneath, unless provisions are made to transfer the load, or the slab is designed to resist the load imposed by the anchor; or (b) slabs are poured over concrete block foundation walls.

Reinforced Concrete Block

• Before concrete pour, install diagonally at approx. 45° in the cell per plan view detail shown on the right.
• Horizontal #4 rebar (minimum 56" long centered about the anchor bolt)—approximately one rebar 12" from the top and two rebars approximately 28" from the top. Vertical #4 rebar (minimum 24" long) install with maximum 24" o.c. spacing.
• Grout all cells with minimum 2000 psi concrete. Vibrate the grout per the International Building Code®, Section 2104.1.

Codes: ICC-ES ER-4935

Plan view of SSTB Placement in Concrete:
		roll over images below to see larger image
		Corner Installation (Install with arrow on top of the bolt oriented as shown) Non-Corner Installation (Bolt may be installed @ 45° to 135° as shown) Corner Installation (Install with arrow on top of the bolt oriented as shown)

Typical Plan Views of Rebar Installation:
		roll over images below to see larger image
		Corner Installation Continuous Stemwall End Wall (See footnote 4)

Load Table:

1. Loads may not be increased for short-term loading. Loads apply to earthquake and wind loading.
2. Minimum anchor center-to-center spacing is 2l_e for anchors acting in tension at the same time for full load.
3. The SSTB was tested in a stem wall with a minimum amount of concrete cover.
4. Use full table load when installed 24" from the end or installed in a corner condition (see illustrations). When used 5" from the end of a concrete foundation (see end wall graphic), the maximum allowable load is 9045 lbs. for SSTB28, 9585 lbs. for SSTB34 (these loads are not Code listed - contact Simpson for test data).
5. Connection is limited by the lowest of bolt or holdown capacity.
6. Order the SSTBL models for longer thread length (51/2") ex. SSTB28L. SSTBL and SSTB loads are the same.
7. SSTB34 has 4 1/2" of thread and isnot available in SSTBL versions.
8. Use 90% of the table load for 2000 psi concrete.
9. Minimum end distance required to achieve table loads is l_e.
10. Minimum end distance required to achieve CMU Block End table loads is 4 1/4".
11. Loads based on ICC-ES ER-4935.

Related Literature:

Wood Strong-Wall Concrete Templates

1. The height of the garage curb above the garage slab is critical for rough header opening on portal walls.
2. See Garage Portal for curb height tables.
3. Raised Floor Wood Strong-Wall shearwalls require 1 1/2" or 3" of concrete on either side. Allow 1 1/2" or 3" of concrete on either side of the template if the design is for a wood 1st floor or 2nd floor application.
4. For RF Raised Floor walls, use the corresponding Standard Wood Strong-Wall shearwall template as required.
5. Templates are recommended and are required in some jurisdictions.
6. Foundation design by others.
7. Templates are the same for 4" or 6" thick walls.

Anchor Bolt Layout: 

Wood Strong-Wall Anchor Bolt Layout

1. SW16 and SW22 sheathing extends 1/2" past the face of adjacent framing.
2. SW48 walls have 3 mudsill anchor bolts. Dimension shown is to first bolt from edge.
3. Templates are recommended and are required in some jurisdictions.
4. Dimension is the same for 4" or 6" thick wall models.

Related Literature:

These tables (PDF) show embedments for Wood Strong-Wall panels installed on existing Garage Curb, Slab on Grade, Stemwall, and Brick Ledge foundations.

Simpson’s SET epoxy is a two-component, low odor anchoring adhesive for high strength anchoring applications in concrete and masonry. It is ideal for installing threaded rod anchors in hardened concrete for Wood Strong-Wall anchorage. Resin and hardener are dispensed and mixed simultaneously through the mixing nozzle. Follow all hole preparation and installation instructions on the cartridge. See more information about SET High Strength Epoxy on the Simpson Strong-Tie Anchor Systems website.

Codes:

• ICC-ES ESR-1772
• City of L.A. RR 25279
• Florida FL5550.3
• Metro Dade 01-1026.02
• Caltrans Approved
• Multiple DOT Listings.