GPI 20 I-Joist - BlueLinx

Engineered
Lumber
Georgia-Pacific
GPI 20 Series I-Joists
feature LVL flanges,
and now offer a new
14� depth for easier
utility installation
4300 Wildwood Parkway
Atlanta, GA 30339
1-888-502-BLUE
www.BlueLinxCo.com
Features and Benefits:
• New 14� depth available
• Allows larger holes for HVAC,
plumbing, and wiring
•1 3 ⁄4� wide laminated veneer flange
• 3 ⁄8� FiberStrong ® OSB web
• Greater dimensional stability and
uniform depth than ordinary lumber
• Won’t shrink or twist
• Lightweight, cost efficient, and easy
to work with
• Lifetime limited warranty (See manufacturer’s
warranty for terms, conditions and limitations.
To receive a copy of the manufacturer’s warranty
call 1-888-502 BLUE.)
GPI 20 Residential Floor Span Chart
GPI 20
I-Joist
LVL Flange
3 ⁄8� FiberStrong ®
OSB Web
40 PSF Live Load + 10 PSF Dead Load, Improved Performance 1 (L/480)
Joist Spacing (Simple Span) Spacing (Multiple Span)
Depth 12�� o.c. 16�� o.c. 19.2�� o.c. 24�� o.c. 12�� o.c. 16�� o.c. 19.2�� o.c. 24�� o.c.
11 7 ⁄8� 20�-05� 18�-08� 17�-08� 16�-06� 22�-02� 20�-03� 19�-01� 17�-05�
14� 23�-03� 21�-03� 20�-01� 18�-09� 25�-04� 23�-02� 21�-04� 18�-06�
NOTES:
1. These span charts are based on uniform loads, as noted above; live load deflection is limited to L/480
for better performance. Floor performance is greatly influenced by the stiffness of the floor joists.
Experience has shown that joists designed to the code minimum live load deflection (L/360) will result
in a floor which may not meet the expectations of some end users. BlueLinx strongly recommends floor
spans for Wood I Beam joists in accordance with those given above, which are based on L/480 live
load deflection (one-third stiffer than required by code).
2. Spans are clear distances between supports, and are based on composite action with glued-nailed
APA Rated ® Sheathing or Sturd-I-Floor ® panels of minimum thickness 19 ⁄32� (40/20 or 20oc) for joist
spacing of 19.2� or less, or 23 ⁄32� (48/24 or 24 oc) for a joist spacing of 24�. Adhesive must meet APA AFG-01
or ASTM D 3498. Apply a continuous line of glue (about 1 ⁄4� diameter) to top flange of joists. All surfaces
must be clean and dry. If sheathing is nailed only (not recommended), reduce spans by 12� .
3. Minimum end bearing length is 1 3 ⁄4.�� Minimum intermediate bearing length is 3 1 ⁄2��.
4. For multiple-span joists: End spans must be at least 40% of the adjacent span. Spans shown above
cover a broad range of applications. It may be possible to exceed these spans by analyzing a specific
application with GP FASTBeam ® selection software.
5. For loading other than that shown above, refer to Uniform Load Tables, use FASTBeam software, or
contact BlueLinx Engineered Lumber Technical Services.
6. Not all products are available at all distribution centers; contact BlueLinx for availability.
1 3 ⁄8�
1 3 ⁄4�
continued on reverse

4300 Wildwood Parkway
Atlanta, GA 30339
1-888-502-BLUE
www.BlueLinxCo.com
GEORGIA-PACIFIC, GP, the GEORGIA-PACIFIC logo,
FASTBEAM, FIBERSTRONG and WOOD I BEAM
are owned by or licensed to Georgia-Pacific Wood
Products LLC. APA RATED and STURD-I-FLOOR
are registered trademarks of APA-The Engineered
Wood Association. BLUELINX and the BLUELINX
design are trademarks and registered servicemarks
of BlueLinx Corporation.
©2007 Georgia-Pacific Wood Products LLC.
All rights reserved. Printed in the U.S.A. 6/07
WBM Lit. Item #122972.
GPI 20 Series Section Design Properties
Specifications:
Flange: 1 3 ⁄4� x 1 3 ⁄8�
Web: 3 ⁄8� FiberStrong ® OSB
Available Depths: 11 7 ⁄8�, 14�
Available Lengths: 24�, 28�, 32�, 36�, 40�, 48�
GPI 20
I-Joist
Allowable Allowable Allowable Reactions
EI Moment a,b Shear b
End b,c Intermediate b,d C Weight e
Depth (106 inch2 lbs) (ft-lbs) (lbs) (lbs) (lbs) (10 6 ft-lbs/in) (lbs/ft)
117 ⁄8� 274 3870 1435 1100 2340 0.515 2.6
14� 409 4640 1710 1150 2340 0.607 2.9
NOTES:
a. Allowable moment may not be increased for any code allowed repetitive member use factor.
b. Allowable moment, shear, and reaction values are for normal duration loading and may be increased
for other load durations in accordance with code.
c. Allowable end reaction is based on a minimum bearing length of 1 3 ⁄4� without bearing stiffeners.
For a bearing length of 4�, the allowable end reaction may be set equal to the tabulated shear value.
Interpolation of the end reaction between 13 ⁄4� and 4� bearing is permitted. For end reaction values
over 1,550 lbs., bearing stiffeners are required.
d. Allowable intermediate reaction is based on a minimum bearing length of 3 1 ⁄2�.
e. Weight of joists for dead load calculations. For shipping weights contact BlueLinx.
APPROXIMATE DEFLECTION* (Inches) =
W = Uniform Load (lbs/foot)
L = Span (feet)
EI = Stiffness Constant
C = Shear Deflection Constant
*Constants have been adjusted to maintain unit consistency.
22.5 x W x L4 W x L2 +
EI
C