A center-point bending test was performed on a 2x4 wood lumber according to ASTM D198 procedure with a span of 4 ft and the nominal 4-inch side is positioned vertically. If the maximum load was 240 lbs and the corresponding deflection at midspan was 2.4 inches, calculate the modulus of rupture and the apparent modulus of elasticity. Please remember that the 2x4 is the nominal dimension size, not the actual size of the specimen. In the 3rd Edition, please see Experiment 29 in the back of the book for the equations. In the 4th Edition, see Experiment 30.

A center-point bending test was performed on a 2x4 wood lumber according to ASTM D198 procedure with a span of 4 ft and the nominal 4-inch side is positioned vertically. If the maximum load was 240 lbs and the corresponding deflection at midspan was 2.4 inches, calculate the modulus of rupture and the apparent modulus of elasticity. Please remember that the 2x4 is the nominal dimension size, not the actual size of the specimen. In the 3rd Edition, please see Experiment 29 in the back of the book for the equations. In the 4th Edition, see Experiment 30.

Construction Materials, Methods and Techniques (MindTap Course List)

4th Edition

ISBN:9781305086272

Author:William P. Spence, Eva Kultermann

Publisher:William P. Spence, Eva Kultermann

Chapter18: Wood, Plastics, And Composites

Section: Chapter Questions

Problem 11RQ

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