Floor details, Jan 2014, Floor installation guidelines – Georgia-Pacific Engineered Lumber Canada User Manual

Page 3: Pa ge, Canadian installation instructions

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3

JAN 2014

pA

ge

cANAdiAN iNstAllAtioN iNstructioNs

georgiA-pAcific Wood products

Holes may be cut in web for
plumbing, wiring and duct work.

NOTE: Never cut or notch flanges.

Use code approved hangers

Glulam or multiple
Structural Composite
Lumber (SCL)
headers

Glulam or multiple
SCL headers

Some framing requirements such as
erection bracing and blocking panels
have been omitted
for clarity.

1M

1K

1J

1H

1F

1N

1A

1G

1E

1J

1C

1B

1D

1. Before laying out floor system components, verify that

I-Joist flange widths match hanger widths. If not, contact
your supplier.

2. Except for cutting to length, never cut, drill, or notch

I-Joist flanges.

3. Install I-Joists so that top and bottom flanges are within

1

2

" of true vertical alignment.

4. I-Joists must be anchored securely to supports before

floor sheathing is attached, and supports for multiple-
span joists must be level.

5. Minimum bearing lengths: 1

3

4

” for end bearings and

3

1

2

” for intermediate bearings.

6. When using hangers, seat I-Joists firmly in hanger

bottoms to minimize settlement.

7. Leave a

1

16

” gap between the I-Joist end and a header.

8. Concentrated loads greater than those that can

normally be expected in residential construction should
only be applied to the top surface of the top flange.
Normal concentrated loads include track

lighting fixtures, audio equipment and security cameras.
Never suspend unusual or heavy loads from the
I-Joist’s bottom flange. Whenever possible, suspend
all concentrated loads from the top of the I-Joist. Or,
attach the load to blocking that has been securely
fastened to the I-Joist webs.

9. Never install I-Joists where they will be permanently

exposed to weather, or where they will remain in direct
contact with concrete or masonry.

10. Restrain ends of floor joists to prevent rollover. Use rim

board or equivalent, rim joists or I-Joist blocking panels.

11. For I-Joists installed over and beneath bearing walls, use

full depth blocking panels, rim board, or squash blocks
(cripple members) to transfer gravity loads through the
floor system to the wall or foundation below.

12. Due to shrinkage, common framing lumber set on edge

may never be used as blocking or rim boards. I-Joist
blocking panels or other engineered wood products
– such as rim board – must be cut to fit between the
I-Joists, and an I-Joist compatible depth selected.

13. Provide permanent lateral support of the bottom flange

of all I-Joists at interior supports of multiple-span joists.
Similarly, support the bottom flange of all cantilevered
I-Joists at the end support next to the cantilever
extension. In the completed structure, the gypsum
wallboard ceiling provides this lateral support. Until the
final finished ceiling is applied, temporary bracing or
struts must be used.

14. If square-edge panels are used, edges must be supported

between I-Joists with 2 x 4 blocking. Glue panels to
blocking to minimize squeaks. Blocking is not required
under structural finish flooring, such as wood strip
flooring, or if a separate underlayment layer is installed.

15. Nail spacing:

• Space nails installed to the flange’s top face in

accordance with the applicable building code
requirements or approved building plans.

• If nails must be installed into the sides of flanges,

spacing shall not be closer than 3 inches o.c. for 8d
common nails, and 4 inches o.c. for 10d common nails.

Floor details

Floor installation Guidelines

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