Georgia-Pacific APA Engineered Wood Construction Guide - Floors - Manual (Page 6)

Floor Construction
ENGINEERED WOOD CONSTRUCTION GUIDE ■ FORM NO. E30V ■ © 2011 APA – THE ENGINEERED WOOD ASSOCIATION ■ WWW.APAWOOD.ORG 33
If the floor has become wet during construction, it should be allowed to dry before application of finish floor, includ-
ing carpet, underlayment, hardwood flooring, ceramic tile, etc. After it is dry, the floor should be checked for flatness,
especially at joints.
When floor members are dry, make
sure fasteners are flush with or slightly
below surface of the STURD-I-FLOOR
panels just prior to installation of thin
floor coverings. Fasteners should be
set if green framing will present nail
popping problems upon drying. Do
not fill nail holes. To minimize the
chance of floor squeaks, installers
should press panels tightly onto joists
by standing on the panel over the joist
next to the nailing point. Fill and thor-
oughly sand edge joints (this step may
not be necessary under some carpet
and structural flooring products –
check recommendations of flooring
manufacturer). Fill any other damaged
or open areas, such as splits, and sand
all surface roughness. (Ensure fill com-
pound is fully cured before sanding
because it may continue to expand as
it cures.)
2x treated sill
Stagger end joints
APA RATED STURD-I-FLOOR
16, 20, 24 oc
Carpet and pad
2x rim joist or
APA Rim Board
1/8" spacing
is recommended
at all edge and end
joints unless otherwise
indicated by panel
manufacturer
Blocking with
square edge panels
2x joist, I-joists
or floor trusses –
16", 19.2", or
24" o.c.
Tongue-and-groove
edges (or 2" lumber
blocking between supports)
Notes:
1. Provide adequate
moisture control and
use ground cover vapor
retarder in crawl space.
Panels must be dry before
applying finish floor.
2. For buildings with wood or steel
framed walls, provide 3/4" temporary
expansion joints with separate floor framing
members and discontinuous wall plates over the joints,
at intervals that limit continuous floor areas to 80 feet
maximum in length or width, to allow for accumulated
expansion during construction in wet weather conditions.
Refer to APA Technical Note: Temporary Expansion Joints
for Large Buildings, Form U425 , for detailed information.
FIGURE 1
APA RATED STURD-I-FLOOR 16, 20, AND 24 oc
Strength axis
Construction
adhesive optional
TABLE 12
RECOMMENDED UNIFORM FLOOR LIVE LOADS FOR APA RATED STURD-I-FLOOR
AND APA RATED SHEATHING WITH STRENGTH AXIS PERPENDICULAR TO SUPPORTS
(a)
Sturd-I-Floor
Span
Rating
Sheathing
Span
Rating
Minimum Panel
Performance
Category
Maximum
Span
(in.)
Allowable Live Loads (psf) (b)
Joist Spacing (in.)
12 16 19.2 24 32 40 48 (c)
16 oc
20 oc (e)
24 oc
32 oc
48 oc
24/16, 32/16
40/20
48/24
60/32
(f)
NA
7/16 (d)
19/32, 5/8
23/32, 3/4
7/8
1-3/32, 1-1/8
16
19.2
24
32
48
185
270
430 100
150
240
405
100
160
295
425
100
185
290
100
160
100 55
(a) Panels 24" or wider applied over two spans or more, dry; normal
load duration assumed.
(b) 10 psf dead load assumed. Live load deflection limit is l/360.
(c) 4x nominal or double 2x framing.
(d) 19/32 is minimum Performance Category of Rated Sturd-I-Floor.
(e) While Span Rating is shown as 20 oc, the actual joint spacing is
19.2 inches
(f) Check with supplier for availability.