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ASTM E661 – Standard Test Method for Performance of Wood and Wood-Based Floor and Roof Sheathing Under Concentrated Static and Impact Loads


This test method covers procedures for determining the resistance to deflection and damage of floor and roof sheathing used in site-built construction subjected to concentrated static loads as well as impact loads from nonrigid blunt objects.

It is applicable to wood and wood-based panels and boards, but is not intended to cover profiled metal decks, nor precast or cast-in-place slabs. Surface indentation is not evaluated separately
from deflection.


concentrated static load; deflection resistance; dropbag tests; floor sheathing; impact load; roof sheathing; ultimate impact load; wood sheathing

ASTM E661 Accredited Laboratory

Applied Testing & Geosciences, LLC is accredited for performing tests using the ASTM E661 standard.

Contact us for more information.