Flat Strapping

Multipurpose flat stock used for bracing, bridging, backing or tension strapping

Flat Strapping is made in a variety of widths and thicknesses to meet different application requirements.

Description

Flat Strapping is made in a variety of widths and thicknesses to meet different application requirements.

Applications include:

  • Horizontal strap lateral bracing for wall studs
  • Strap bridging for bottom of floor joists
  • Strap backing plate for attachment of fixtures in walls
  • Tension strapping for shear wall x-bracing

Horizontal strap lateral bracing for wall studs

Commonly used bracing for wall studs deeper than 6"

Properly spaced horizontal steel bracing provides resistance to stud rotation and minor axis buckling under wind and axial loads. Block and strapping is typically used when wall studs exceed 6".  U-Channel or the Spazzer® bar does not provide sufficient bracing for members wider than 6". Both stud flanges must be attached to top and bottom runner flanges to provide proper end support. Floor and ceiling runners must also be anchored securely to the structure. To utilize the stud’s load carrying capacity fully, horizontal bracing must be installed at proper intervals.

Strap backing plate for attachment of fixtures in walls

Added support where shelves, cabinets, fixtures or handrails are installed

Strapping backing plate is a general multipurpose flat stock that is used for backer plate to support shelves, cabinets, fixtures or handrails when applied to metal framing.

Technical Data

Load Tables


Tensile Values For Straps [Tn (lbs]

    Thickness (mils) / Design Thickness / Gauge Reference
Strap Width
(in)
Yield Strength
(ksi)
18
0.0188
25
27
0.0283
22
30
0.0312
20 DW
33
0.0346
20 STR
43
0.0451
18
54
0.0566
16
68
0.0713
14
97
0.1017
12
1 33 371 559 617 684 891 1118 1409 2010
50 563 847 934 1036 1350 1695 2135 3045
2 33 743 1118 1233 1367 1782 2237 2818 4019
50 1126 1695 1868 2072 2701 3389 4269 6090
3 33 1114 1678 1850 2051 2674 3355 4227 6029
50 1689 2542 2802 3108 4051 5084 6404 9135
4 33 1486 2237 2466 2735 3565 4474 5636 8039
50 2251 3389 3737 4144 5401 6778 8539 12180
5 33 1857 2796 3083 3419 4456 5592 7045 10048
50 2814 4237 4671 5180 6751 8473 10674 15225
6 33 2229 3355 3699 4102 5347 6711 8454 12058
50 3377 5084 5605 6216 8102 10168 12808 18269
7 33 2600 3915 4316 4786 6238 7829 9862 14067
50 3940 5931 6539 7251 9452 11862 14943 21314
8 33 2972 4474 4932 5470 7130 8948 11271 16077
50 4503 6778 7473 8287 10802 13557 17078 24359
9 33 3343 5033 5549 6153 8021 10066 12680 18087
50 5066 7626 8407 9323 12153 15251 19213 27404
10 33 3715 5592 6165 6837 8912 11184 14089 20096
50 5629 8473 9341 10359 13503 16946 21347 30449
11 33 4086 6151 6782 7521 9803 12303 15498 22106
50 6192 9320 10275 11395 14853 18641 23482 33494
12 33 4458 6711 7398 8205 10694 13421 16907 24116
50 6754 10168 11210 12431 16204 20335 25617 36539

Note: Load capacities do not include a 1/3 stress increase.

Product Data & Ordering Information

Strapping is available in coil form or flat length of 10'

  • 10' long strapping widths available: 1" to 12”
  • Coil form strapping widths available: 1", 1-1/2",2",2-1/2" and 3"

Thicknesses: 18mil (25ga) - 97mil (12ga)

Not all strapping products are available in all markets. Please check with your local ClarkDietrich sales representative for availability in your area.

Coating & Yield Strength must be specified at the time of order

Coatings:
18mil - 30mil = G40EQ (G40 or G60 available)
33mil - 97mil = CP60 (G90 available)

Yield Strength:
18mil - 30mil = 30ksi
33mil - 97mil = 50ksi

 

 

 

Installation

Installation

Horizontal strap lateral bracing for wall studs

Lateral bracing consists of a field-cut stud or track for solid blocking and steel strap bracing on both flanges of the studs. Solid blocking is placed at each end of the wall, adjacent to wall openings and 8' O.C. maximum. The blocking is attached to each adjacent stud via EasyClip™ E- or S- Series™ clips, or when a track is used, the flanges are cut, the web bent and a minimum 4" overlap is used to secure the track block to the studs. Strap bracing, 2" wide and 20-gauge (33 mil) minimum, is fastened to each solid block and stud flange.

 

Strap backing plate for attachment of fixtures in walls

Strapping backing plate is a general multipurpose flat stock that is used for backer plate to support shelves, cabinets, fixtures or handrails when applied to metal framing.
Use as backer plates for attachment of fixtures to metal stud walls.

Resources

ASTM & Code Standards:

  • Sheet steel meets or exceeds requirements of ASTM A1003
  • Galvanized coating meets or exceeds requirements of ASTM A653
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