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
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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 18 gauge43 mil

Design Thickness

 N/A 0.0346 in

Tensile Strength Fy

 N/A 33 ksi

Depth

 N/A 4 in

Flange Size

 N/A 3 in

Return

 N/A 1-1/16 in

Double Return

 N/A 3/4 in

Minimum Delivered Thickness

 N/A 0.0428 in

Unperforated Section Properties

Area

 N/A 0.574 in²

Weight

 N/A 1.95 lb/ft

Gross Moment of Inertia About X-Axis (Ix)

 N/A 1.198 in4

Gross Section Modulus About X-Axis (Sx)

 N/A 0.661 in³

Gross Radius of Gyration About X-Axis (Rx)

 N/A 1.444 in

Gross Moment of Inertia About Y-Axis (ly)

 N/A 0.805 in4

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

 N/A 1.416 in

Gross Section Modulus About Y-Axis (Sy)

 N/A 0.516 in³

Gross Radius of Gyration About Y-Axis (ry)

 N/A 1.184 in

Torsional Properties

St. Venant Torsion Constant Torsional Properties (Jx1000)

 N/A 0.389 in4

Warping Torsion Constant (Cw)

 N/A 5.759 in6

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

 N/A -3.483 in

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

 N/A 3.952 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 0.223 Beta

Other Properties

Maximum Unbraced Length to Attain Mxa (Lu)

 N/A 102 in

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

 N/A 1.74 kips

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

 N/A 0.68 kips

Allowable Shear for Bending About Y-Axis (Vy)

 N/A 3.09 kips
Other Properties (Px)1 N/A 0.46 kips
Other Properties (Py)2 N/A 0.61 kips

Unperforated Bending Properties

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

 N/A 0.565 in³

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

 N/A 11165 in·lb

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

 N/A 0.516 in³

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

 N/A 11703 in·lb

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

 N/A 0.425 in³

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

 N/A 8401 in·lb

Perforated Bending Properties

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

 N/A 0.540 in³

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

 N/A 10674 in·lb

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

 N/A 0.400 in³

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

 N/A 9080 in·lb

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

 N/A 0.342 in³

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

 N/A 6753 in·lb

Effective Moment of Inertia

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

 N/A 1.161 in4

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

 N/A 0.805 in4

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

 N/A 0.741 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 Standard material coating is CP60 per ASTM C955; G90 available.
  • 1 For members having a web depth of less than 8" and also having a thickness less than 97 mil, allowable web crippling per AISI Standard for CFS Wall Stud Design 2004. This value assumes the web resists web crippling and the HDS is nested in track having the same thickness. For other members, allowable end one flange web crippling per AISI NASPEC, 2001 with 2004 supplement. Both calculation procedures use a bearing length of 1-1/4".
  • 2 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".