RESPONSE OF TIMBER JOINTS WITH METAL FASTENERS TO LATERAL-IMPACT LOADS

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Abstract:

Recent studies were made of two-member wood joints fastened with nails, bolts, or lag screws and subjected to lateral-impact loads. These studies established a relationship, which is independent of the type of metal fastener, between magnitude of impact force, joint slip, fastener diameter, and specific gravity of wood Douglas-fir members. Electronic instrumentation was employed to measure and record the instantaneous forces that were applied to joints in both pendulum and drop tests. Three types of fasteners were tested Eight-, sixteen-, and thirty-penny nails 14-, 12-, and 34-inch bolts and 516-, 12-, and 34-inch lag screws. The work was done in cooperation with the U.S. Air Force, and will be the basis for revised load ratings for metal fasteners in a new blocking and bracing guide. Author

Author(s):
Jordan, C. A.
Author Organization(s):
FOREST PRODUCTS LAB MADISON WIS
Annotation:
TIMBER JOINTS WITH METAL FASTENERS SUBJECTED TO LATERAL-IMPACT LOADS. TWO MEMBER WOOD JOINTS FASTENED WITH NAILS, BOLTS OR LAG SCREWS WERE TESTED AND A RELATIONSHIP WAS ESTABLISHED BETWEEM MAGNITUDE OF IMPACT FORCE, JOINT SLIP, FASTENER DIAMETER AND SPECIFIC GRAVITY OF WOOD MEMBERS.
Pagination:
0001

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
2263
 Subject Terms
Joint Capability Areas:
JCA_1.2_Force Preparation; JCA_1_Force Support
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*JOINTS, *WOOD, BOLTS, DENSITY, LOADING(ORDNANCE PROJECTORS), STUDS(STRUCTURAL COMPONENTS), TEST METHODS
Report Date:
1962 Mar 01