Section Contents

Popular APA Panel Grades for OSB

 Grade Designation
Description & Common
Use Applications
Performance
Category
 Recommended Thickness
Label in Inches1
(mm equivalent given in brackets)
 Typical
APA
Trademark for
OSB
Available Exposure
Durability
Classification
(BS EN 300 equivalent classification)
APA Rated Sheathing
Unsanded sheathing grade for wall, roof, subflooring and industrial applications such as pallets and engineering design with proper capacities
3/8 PERF
CAT
7/16 PERF
CAT
15/32 PERF
CAT
1/2 PERF
CAT
19/32 PERF
CAT
5/8 PERF
CAT
23/32 PERF
CAT
3/4 PERF
CAT
Thickness 0.354 IN (8.99)
Thickness 0.418 IN (10.62)
Thickness 0.451 IN (11.46)
Thickness 0.483 IN (12.27)
Thickness 0.578 IN (14.68)
Thickness 0.609 IN (15.47)
Thickness 0.703 IN (17.86)
Thickness 0.734 IN (18.64)
Exposure 12
(OSB/2)
Notes:
1  Inches designated because of custom in the USA. Metric mm figure does not appear in the trademark.
2  Equivalent to panel classification OSB/2 – load bearing boards for use in dry conditions – as per BS EN 300 : Oriented Strand Board (OSB) – Definition, classification and specifications.

 

APA Structural 1 Rated Sheathing
Panel grades to use where shear and cross-panel strength properties are of maximum importance.
3/8 PERF CAT
7/16 PERF CAT
15/32 PERF CAT
1/2 PERF CAT
19/32 PERF CAT
5/8 PERF CAT
23/32 PERF CAT
3/4 PERF CAT
Thickness 0.354 IN (8.99)
Thickness 0.418 IN (10.62)
Thickness 0.451 IN (11.46)
Thickness 0.483 IN (12.27)
Thickness 0.578 IN (14.68)
Thickness 0.609 IN (15.47)
Thickness 0.703 IN (17.86)
Thickness 0.734 IN (18.64)

Exposure 12
(OSB/2)

 

APA Rated Sturd-I-Floor
A single layer floor decking comprising of a combination of subfloor-underlayment.  It provides a smooth surface for application of carpet or pad.  Possesses high concentrated and impact load resistance during construction and occupancy.  Touch-sanded. Available as a square edged panel or with a tongue and groove on the two long edges.
19/32 PERF CAT
5/8 PERF CAT
23/32 PERF CAT
3/4 PERF CAT
7/8 PERF CAT
1 PERF
CAT
1-1/8 PERF CAT
Thickness 0.578 IN (14.68)
Thickness 0.609 IN (15.47)
Thickness 0.703 IN (17.86)
Thickness 0.734 IN (18.64)
Thickness 0.849 IN (21.56)
Thickness 0.970 IN (24.64)
Thickness 1.090 IN (27.71)
Exposure 12
(OSB/2)
Notes:
1   Inches designated because of custom in the USA. Metric mm figure does not appear in the trademark.
2    Equivalent to panel classification OSB/2 – load bearing boards for use in dry conditions – as per EN 300 : Oriented Strand Board (OSB) – Definition, classification and specifications.