Designing with Plywood--Considerations for Selecting and Using Plywood Correctly for Concrete Forming

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Title: Designing with Plywood--Considerations for Selecting and Using Plywood Correctly for Concrete Forming

Author(s): John V. Gould

Publication: Special Publication

Volume: 90

Issue:

Appears on pages(s): 39-48

Keywords: costs; formwork (construction); parting agents; plywood; pressure; strength; stiffness; surface defects; General

Date: 4/1/1986

Abstract:
There are four different basic types of plywood most commonly available to the concrete form industry: sanded (non-overlaid), high-density overlay, medium-density overlay, and imported Finnish birch. The differences and important factors needed to help the specifier select the right one and use it correctly have not always been well understood. This paper discusses some of the important considerations: surface characteristics imparted to the concrete; number of reuses, economy, relative cost on a per-use basis; strength and stiffness and use of load-span tables; and the importance of proper edge sealing and form release.