A-1 ALLOYS
A-1 ALLOYS INC.
3330 Beyer Bl. #F
San Diego, CA, 92173
Phone: 1-800-266-2569
Fax: (619) 591-2198
Email: a1sales@a1alloys.com
Website: www.birdprecision.com
Print Back
The HDS® Framing System is a high-performance, cost-effective, multipurpose, heavy-duty framing stud for headers, jambs, posts and built-up tube truss chords and webs. The superior strength and carrying capacity of the HDS® Framing System means higher performance with fewer members. It means eliminating box beam headers, nesting track and stud for posts and jambs, and eliminating multi-member built-up truss chords and webs. It also means improved finish quality by eliminating excessive material and screw head buildup around doors and windows.
Unit of Measure

Specifications

Brands

 N/A A-1 Alloys ClarkDietrich® HDS®

Thickness

 N/A 20 gauge33 mil

Design Thickness

 N/A 0.0713 in

Tensile Strength Fy

 N/A 50 ksi

Depth

 N/A 8 in

Flange Size

 N/A 3 in

Return

 N/A 2-1/4 in

Double Return

 N/A 3/4 in

Minimum Delivered Thickness

 N/A 0.0329 in

Unperforated Section Properties

Area

 N/A 0.679 in²

Weight

 N/A 2.31 lb/ft

Gross Moment of Inertia About X-Axis (Ix)

 N/A 6.134 in4

Gross Section Modulus About X-Axis (Sx)

 N/A 1.533 in³

Gross Radius of Gyration About X-Axis (Rx)

 N/A 3.005 in

Gross Moment of Inertia About Y-Axis (ly)

 N/A 1.122 in4

The Distance from the Web Centerline to the Center of Gravity (xbar)

 N/A 1.294 in

Gross Section Modulus About Y-Axis (Sy)

 N/A 0.665 in³

Gross Radius of Gyration About Y-Axis (ry)

 N/A 1.285 in

Torsional Properties

St. Venant Torsion Constant Torsional Properties (Jx1000)

 N/A 0.272 in4

Warping Torsion Constant (Cw)

 N/A 33.350 in6

Distance from Shear Center to the Centroid Along the Principal X-Axis (Xo)

 N/A -3.412 in

Polar Radius of Gyration About the Centroidal Principal Axis (Ro)

 N/A 4.725 in

Distance from Shear Center to the Centroid Along the Principal X-Axis/Polar Radius of Gyration About the Centroidal Principal Axis 1-(Xo/ro)2

 N/A 0.479 Beta

Other Properties

Maximum Unbraced Length to Attain Mxa (Lu)

 N/A 113 in

Allowable Shear for Bending About X-Axis (Unperforated Vx)

 N/A 0.47 kips

Allowable Shear for Bending About Y-Axis (Vy)

 N/A 2.05 kips
Other Properties (Py)1 N/A 0.38 kips

Unperforated Bending Properties

Effective Section Modulus About X-Axis (Sxe) Unperforated Bending Properties

 N/A 1.084 in³

Allowable Moment About X-Axis (Mxa) Unperforated Bending Properties

 N/A 21420 in·lb

Effective Section Modulus About X-Axis (Sye) Unperforated Bending Properties (Web in Ten.)

 N/A 0.548 in³

Allowable Moment About Y-Axis (Mya) Unperforated Bending Properties (Web in Ten.)

 N/A 10829 in·lb

Effective Section Modulus About X-Axis (Sye) Unperforated Bending Properties (Web in Comp.)

 N/A 0.333 in³

Allowable Moment About Y-Axis (Mya) Unperforated Bending Properties (Web in Comp.)

 N/A 6570 in·lb

Effective Moment of Inertia

Effective Moment of Inertia About X-Axis for Deflection Calculations (lxe)

 N/A 5.805 in4

Effective Moment of Inertia About Y-Axis for Deflection Calculations (Web in Ten. (lye))

 N/A 1.076 in4

Effective Moment of Inertia About Y-Axis for Deflection Calculations (Web in Comp. (lye))

 N/A 0.703 in4

Construction Advantages

Construction Advantages

 N/A
  • Outstanding bending strength in two directions.
  • Reduces installation time by 50%.
  • Eliminates box beam header assembly.
  • Reduces material and labor costs up to 50%.
  • HDS® can be screw-attached from either side.
  • Eliminates stud-to-track nesting for post, header and jamb studs.
  • Openings up to 15' wide.
  • Improves drywall finishing around doors and windows. No screw head buildup.
  • Superior axial strength.

Note

Note

 N/A Indicates that h/t exceeds 200. Web stiffeners are required at bearing points. No holes in the web are permitted.

Standard material coating is CP60 per ASTM C955; G90 available.
  • 1 Allowable end one flange web crippling per AISI NASPEC, 2001 w/2004 supplement. This value assumes 2 flanges resist web crippling for a bearing length of 1-1/4".