Georgia-Pacific Engineered Lumber - Manual (Page 4)

I-Joist Installation
Use single I-joist for loads up to 2000 plf,
double I-joists for loads up to 4000 plf
(filler block not required)
Wall sheathing
as required.
Provide backer as required
for siding and/or wall
sheathing attachment
APA Rim Board may be used in lieu of
I-joists. Backer is not required when
APA Rim Board is used.
floor details
Wood I Beam ™
blocking panel
Minimum 8d nails at 69 o.c.
F2 BLOCKING PANEL, EXTERIOR
Vertical load transfer = 2000 plf max.
Starter joist
Blocking where required
by local codes for lateral
load transfer and/or
optional blocking for
diaphragm nailing
Minimum
8d nails
at 6” o.c.
toe-nail
to plate,
typical
(3) 8d
nails at
corners
FiberStrong
rim board
One 2x4 min. with 1 ⁄ 8 9 gap at top,
fasten with 8d box nails from
each web into 2x_.
FiberStrong
rim board
8d nails
top and bottom flange
Check local building code for
appropriate detail in areas of
high lateral load.
Load bearing wall must stack over blocking and wall
or beam below.*
When two joists meet over wall,
provide 1 3 ⁄ 4 9 minimum bearing for
each joist and install blocking
panel to restrain both joists.
Blocking panels not required when
joists are continuous over wall and
no load bearing wall exists above.
Minimum 8d nails at 69 o.c.
*Non-stacking load bearing walls
require additional consideration.
F9 BLOCKING PANEL, INTERIOR
Vertical load transfer = 2000 plf max. along load bearing wall.
Headers can be single
or double I-joists.
Assemble double joist per
detail F11 (regular filler).
Backer Block (use if hanger load exceeds 250 lbs.)
Before installing backer to double joist, drive an additional (3) 10d nails into
web where backer will fit. Clinch when possible. Install backer tight to top
flange. Use (10) 10d nails, clinched when possible.
F12 FLOOR OPENING, TOP MOUNT HANGERS FLOOR OPENING, TOP MOUNT HANGERS
Backer blocks required
both sides of web
(per hanger
manufacturer).
Hangers for 148
(max) Stringer Nailing Requirement
United Steel Minimum (12) 10d nails into
Products MSH 218 double joists or LVL header.
OR Simpson Minimum (4) 10d x 1 1 ⁄
2 9
Strong-Tie ® THA 218 nails into stringer.
Toe-nail rim joist to top flange
of joist with 10d nail.
F5 F3 WOOD I BEAM ™ RIM JOIST Vertical load transfer = 2000 plf max.
* Block must be long enough to permit required nailing without splitting.
backer blocks *
Joist Series Joist Depth Material Depth
GPI 20 9 1 ⁄ 2 9, 11 7 ⁄ 8 9, 23 ⁄ 32 9 6 1 ⁄ 4 9, 8 3 ⁄ 4 9,
149 10 3 ⁄ 4 9
GPI 40 9 1 ⁄
2 9, 11 7 ⁄
8 9, 7 ⁄
8 9 6 1 ⁄
4 9, 8 3 ⁄
4 9,
149 10 3 ⁄ 4 9
GPI 65, 9 1 ⁄ 2 9, 11 7 ⁄ 8 9, 1 ⁄ 2 9 + 1 ⁄ 2 9 6 1 ⁄ 4 9, 8 3 ⁄ 4 9,
WI 40, WI 60 149, 169 10 3 ⁄ 4 9, 12 3 ⁄ 4 9
GPI 90, WI 80 11 7 ⁄ 8 9, 149, 169 1 1 ⁄ 2 9 net 8 3 ⁄ 4 9, 10 3 ⁄ 4 9,
12 3 ⁄
4 9
SQUASH BLOCKS AT CONCENTRATED LOADS
1 ⁄ 16 9
gap
Solid block all posts
to bearing below
with equal number
of squash blocks.
For stair stringers longer than 148 or stringer reactions greater than 700 lbs.,
call Georgia-Pacific.
FIBERSTRONG ® RIM CLOSURE
Vertical load transfer of 1 1 ⁄ 8 ” rim board = 4850 plf
Double Wood I Beam joist construction
per detail F11 (full depth filler); backer
block size and installation per
detail F12.
F8
Do not bevel cut
joist beyond inside
face of support.
Note: Wood I Beam or
FiberStrong rim board
blocking, or x-bridging
required at bearing for
lateral support.
BEVEL CUT JOIST
Check local building
code for appropriate
detail in areas of high
lateral load.
F14 F19 F21 STAIR STRINGER TO
JOIST CONNECTION
Minimum
1 3 ⁄ 4 9 joist
bearing
at wall
Provide backer
for siding
attachment
unless nailable
sheathing is
used.
Minimum 8d nails at 69 o.c.
Wood I Beam
rim joist
F10 SQUASH BLOCKS AT INTERIOR BEARING
Vertical load transfer = 2000 plf max along load bearing wall.
Check local
building code for
appropriate detail
in areas of high
lateral load.
Load bearing wall must stack over squash blocks and wall or beam below.
Non-stacking load bearing walls require additional consideration.
1 ⁄ 16 9
8d nail into
bottom flange
or plate
8d nail into
top flange
Squash block
(2x4 minimum) used only if
load bearing wall exists above
Bearing wall, GP Lam ® LVL or
glulam beam
Attach joist with one
10d box or sinker nail on
each side of bearing.
Top mount
hangers*
GP Lam ® LVL or Glulam Beam
Properly fastened bearing plate.
Plate must be flush with inside
face of steel beam. Plate
can overhang beam a
maximum of 1 ⁄ 4 9.
Steel Beam
Bearing stiffeners may be
required at hangers.
A
B
F15 JOIST TO BEAM CONNECTION
* Appropriate face mount hangers may be substituted. Properly fastened solid wood
blocking of the steel beam also required for face mount hangers on steel beam.
Top mount
hangers*
Installation Guide