RESPONSE OF TIMBER JOINTS WITH METAL FASTENERS TO LATERAL-IMPACT LOADS
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: 1/4-, 1/2-, and 3/4-inch bolts; and 5/16-, 1/2-, and 3/4-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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1962
- Accession Number
- AD0290719
Entities
People
- C.a. Jordan
Organizations
- Forest Products Laboratory