Significance and Use

End-jointed lumber studs used in fire resistance-rated assemblies shall be able to support the superimposed design load for the specified time under an elevated temperature exposure, when a wall assembly is exposed to a standard fire specified in Test Methods E 119 . Light-weight wood assemblies utilize gypsum wallboard or other types of membrane protection to accomplish a requisite fire resistance rating for the assembly. However, wood studs and the end-joints in the studs shall resist the developed elevated temperature environment for the duration of the rating. This practice provides a method for evaluating the elevated temperature performance of an adhesive used in end-jointed lumber as compared with the elevated temperature performance of solid wood.

1. Scope

1.1 This standard practice is to be used to evaluate the elevated temperature performance of adhesives used in end-jointed lumber.

1.2 A symmetric wall assembly containing end-jointed lumber studs is exposed to a standard fire exposure specified in Test Methods E 119 .

1.3 The wall assembly shall sustain the applied load during a standard fire exposure specified in Test Methods E 119 for a period of 60 min or more.

1.4 This practice is used to evaluate the performance of adhesives used in end-jointed lumber to heat and flame under controlled conditions, but it does not by itself incorporate all factors required for fire hazard or fire risk assessment under actual fire conditions.

1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

C1396/C1396M Specification for Gypsum Board

D4688 Test Method for Evaluating Structural Adhesives for Finger Jointing Lumber

D6513 Practice for Calculating the Superimposed Load on Wood-frame Walls for Standard Fire-Resistance Tests

E119 Test Methods for Fire Tests of Building Construction and Materials

F1667 Specification for Driven Fasteners: Nails, Spikes, and Staples

Other Standards

Keywords

adhesive; end-joint; end-jointed lumber;

ICS Code

ICS Number Code 83.180 (Adhesives)

DOI: 10.1520/D7374-08

ASTM International is a member of CrossRef.

ASTM D7374