OSB decking, 1/2" (per 4x8 sheet)

The table

50 lb a sheetThe sources give 45 to 54 lb.

Loose volume

0.065 cubic yards a sheet

How it was chosen

APA TT-019, as Boise Cascade reprints it, gives 15/32" or 1/2" plywood or OSB 1.4 to 1.7 lb a square foot: 45 to 54 lb a 32 sq ft sheet; Roof Observations gives 1/2" OSB 54 lb and 15/32" OSB 48 lb. 50 lb is the figure; the volume is 50 lb at Seattle's 775 lb a cubic yard for plywood pieces.

Your figure

None: estimates use the table's.

3 sources

1. Tech Note GE-1: Product Weights (weights of building materials for dead loads, (c) 2021)

   Boise Cascade Wood Products; rows marked (1) cite ASCE 7-16 Table C3.1-1a, sheathing rows (3) cite APA EWS TT-019 (1998) · estimating guide · read 2026-10-23

   SHEATHING: "15/32" or 1/2" Plywood - OSB(3) 1.4 - 1.7" (footnote (3): "Approximate Engineering Dead Load Weight of Wood Structural Panels, APA EWS TT-019, 1998.") Footnote (1): "Minimum Design Loads for Buildings and Other Structures, ASCE 7-16, Table C3.1-1a." Values are pounds per square foot.

   The document An archived copy

2. Plywood Weights, OSB Weights & More: Calculator + Charts (Jack Gray, RRO; updated 12/16/2025)

   Roof Observations · trade publication · read 2026-10-23

   Table 2 (lb per 4'x8' sheet): OSB 15/32" 48 lb, 1/2" 54 lb. "The plywood weights shown here were calculated using the product data sheets or manufacturer specifications of actual, specific wood panel products."

   The document An archived copy

3. General Measurement Standards and Reporting Guidelines: Volume and Weight Conversion Factors for Recyclables

   City of Seattle, Seattle Public Utilities · government · read 2026-10-23

   "Plywood sheet, pieces | one cubic yard | 775 | Tellus" Footnote 1: "Disclaimer: This table is for general guidance only. Not for contract payment."

   The document An archived copy