Technical Bulletin: Wedge Tie Spacing (T-C-WT16)

Wedge Tie Spacing

Simpson Strong-Tie

T-WT

WT6 Simpson Strong-Tie 6" Wedge Form Ties - 250/Box

WT10 Simpson Strong-Tie 10" Wedge Form Ties - 250/Box

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wedge-tie installation
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TECHNICAL BULLETIN
Wedge Tie Spacing

The Wedge Tie (WT) is a form tie that secures concrete forms in place while the concrete is poured. It easily installs between form boards and accurately spaces the forms. Several models are available for varying wall thickness and types of form boards.
The spacing of the WTs along the length of the form depends on the depth of the WT in the form. The spacing does not depend on the thickness of the wall. The maximum recommended spacing for WTs used with 1x, 2x and 1 ¼" thick forms is outlined in the tables below. The tables give spacing guidelines for various form heights and types of form boards. In general, the higher the form is, the closer the spacing of the WTs should be.

Wedge Tie Installed on
SCL
Wedge Tie Installed on Solid Sawn

For Solid Sawn

Location (see Fig. 1)
Top of Form 1 2 3 4 5 6 7 8

Depth of Form
(in.) 0 5.5 11 16.5 22 27.5 33 38.5 44

1x6
Spacing (in.)
27 27 23 22 19 18 17 16 15

2x6
Spacing (in.)
46 46 38 35 32 31 29 28 27

Depth of Form
(in.) 0 7.25 14.5 21.75 29 36.25 43.5 -- --

1x8
Spacing (in.)
25 25 21 19 18 17 15 -- --

2x8
Spacing (in.)
43 43 36 32 30 29 26 -- --

Wedge Tie Installed on Form Board

Form Board (Typ.)

For Solid Sawn

Location (see Fig. 1)
Top of Form 1 2 3 4 5

Depth of Form
(in.) 0 9.25 18.5 27.75 37 46.25

1x10
Spacing (in.) 24 24 20 18 17 15

2x10
Spacing (in.) 40 40 34 31 24 19

Depth of Form
(in.) 0 11.25 22.5 33.75 45 --

1x12
Spacing (in.) 23 23 19 17 15 --

2x12
Spacing (in.) 38 38 32 22 16 --

Figure 1 - Spacing Locations

For SCL

Location (see Fig. 1)
Top of Form 1 2 3 4 5

Depth of Form
(in.) 0 9.25 19 28.5 38 47.5

1 ¼" x 9 ½"
Spacing (in.) 34 34 28 26 23 18

Depth of Form
(in.) 0 11.875 23.75 35.625 47.5 --

1 ¼" x 11 "
Spacing (in.) 32 32 27 20 15 --

Depth of Form
(in.) 0 14 28 42 -- --

1 ¼" x 14"
Spacing (in.) 30 30 21 14 -- --

Depth of Form
(in.) 0 16 32 48 -- --

1 ¼" x 16"
Spacing (in.) 29 29 16 11 -- --

Note: Form board design by others.

Model No.

Solid Sawn
WT6 WT8 WT10 WT12

SCL
WT6/125 WT8/125
-- --

Wall Thickness
6 8 10 12

This technical bulletin is effective until June 30, 2018, and reflects information available as of June 1, 2016. This information is updated periodically and should not be relied upon after June 30, 2018; contact Simpson Strong-Tie for current information and limited warranty or see strongtie.com.

© 2016 Simpson Strong-Tie Company Inc. · P.O. Box 10789, Pleasanton, CA 94588

T-C-WT16 6/16 exp. 6/18

(800) 999-5099 www.strongtie.com


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