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Flat Strap

In addition to it’s standard use in wall bridging, Flat strap is also the tension element used to transfer loads between diagonally located strap tracks in TSN’s StiffWall® System (x-braced shear walls). Straps are utilized on both sides of the StiffWall for shear resistance. TSN’s Flat Strap provides superior quality with high yield ASTM A1003 steel and hot-dipped galvanized coating for long-term durability.
Features
  • Designed and manufactured to meet the performance requirements of the project.
  • Only mill certified high strength steel is used.
  • Meets or exceeds both strength and stiffness requirements of the applicable building code.
Material Composition
A1003 / A1003M ST50H [ST340H], Grade 50 (340), 50ksi (340MPa) minimum yield strength, 65ksi (450 MPa) minimum tensile strength, G-60 (Z180) hot-dipped galvanized coating; or equivalent.
Catalogs

TSN’s Product Catalogs are an essential resource for the design of cold formed steel. Developed by Engineers, the catalogs contain design data for members, connectors, and fasteners. FlatStrap® can be found in the following Catalogs:

TSN Cold-Formed Steel Framing Loadbearing Order Catalog

TSN Loadbearing Technical Catalog

TSN Cold-Formed Steel Framing Loadbearing Technical Catalog

TSN Loadbearing Order Catalog

For a full list of our product catalogs, specification sections, inspection checklists, and research reports please click here.

FlatStrap - X-Bracing - Bridging

Flat Strap Downloads

Flat Strap Tech Sheet

Tech Sheet

LSF Specification

Specification

Flat Strap Detail Drawing

Detail DWG

Flat Strap Applications

Flat Strap is made in a variety of widths and lengths and can be used in TSN’s StiffWall X-Braced Shearwall System or for cold-formed steel wall bridging. 

StiffWall X-Braced Shear Wall - Color Coded Components

X-Braced Shear Wall

Allowable Loads

Flat Strap Product Profile (For StiffWall®)
Section
FS400-54, 50 ksi
FS600-54, 50 ksi
FS800-54, 50 ksi
FS800-68, 50 ksi
FS1000-68, 50 ksi
Flat Strap Product Profile (For StiffWall®)
Width (D) (in)
4
6
8
8
10
Flat Strap Product Profile (For StiffWall®)
Gauge
16
16
16
14
14
Flat Strap Product Profile (For StiffWall®)
Design Thickness (t) (in)
0.0566
0.0566
0.0566
0.0713
0.0713
Flat Strap Product Profile (For StiffWall®)
Min. Steel Thickness (t(min)) (in)
0.0538
0.0538
0.0538
0.0677
0.0677
Flat Strap Product Profile (For StiffWall®)
Area (in²)
0.226
0.340
0.453
0.570
0.713
Flat Strap Product Profile (For StiffWall®)
Weight lbs/ft
0.770
1.156
1.541
1.941
2.426
Flat Strap Product Profile (For Bridging)
Section
FS200-43, 50 ksi
FS300-43, 50 ksi
FS300-54, 50 ksi
Flat Strap Product Profile (For Bridging)
Width (D) (in)
2
3
3
Flat Strap Product Profile (For Bridging)
Gauge
18
18
16
Flat Strap Product Profile (For Bridging)
Design Thickness (t) (in)
0.0451
0.0451
0.0566
Flat Strap Product Profile (For Bridging)
Min. Steel Thickness (t(min)) (in)
0.0428
0.0428
0.0538
Flat Strap Product Profile (For Bridging)
Area (in²)
0.090
0.135
0.170
Flat Strap Product Profile (For Bridging)
Weight lbs/ft
0.307
0.460
0.578

Table Notes

Section properties and capacities are calculated in accordance with AISI-NASPEC 2007.
Structural framing is produced to meet or exceed ASTM C955, A653, and A1003.
Non-Structural framing is produced to meet or exceed ASTM C645, A653, and A1003.
Galvanized sheet steel meets or exceeds requirements of ASTM A924 & A1003

Order Information

The Selection of flat strap for StiffWall is simplified to 6 strap types, with load capacity factored using standard 12ga (97mil) strap track (see Step-By-Step Design Procedure on TSN’s StiffWall product page for Allowable Flat Strap Capacity Chart). Flat Strap is cut to length with square ends, and will need to be cut to final length in the field. To determine the length of the flat straps, follow these simple steps:

  1. Find the width (A) and the height (B) of the StiffWall.
  2. Then, use the following formula to determine the length of the strap: A2 + B2 = C2
  3. Next, take the square root of C, round up to the nearest whole number and add 1

This will result in a length in feet that you can work with. If C equals a whole number, you may want to add 2 to make sure the length is enough.

Example: 8′ wall height with a width of 16′ would look like this: (8×8) + (16×16) = √320. = 17.88
Round up to 18′ and add 1′ for a strap length of 19′.
FlatStrap Load Direction

Load Direction

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