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Title: Wood Handbook, Chapter 08: Fastenings

Source: General Technical Report FPL-GTR-190. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory: 8-1 - 8-28. Chapter 8.

Author(s)Rammer, Douglas R.

Publication Year: 2010  View PDF »

Related Publications: view

Category: General Technical Reports
Associated Research Project(s):   FPL-4714-MA

Abstract: The strength and stability of any structure depend heavily on the fastenings that hold its parts together. One prime advantage of wood as a structural material is the ease with which wood structural parts can be joined together with a wide variety of fastenings—nails, spikes, screws, bolts, lag screws, drift pins, staples, and metal connectors of various types. For utmost rigidity, strength, and service, each type of fastening requires joint designs adapted to the strength properties of wood along and across the grain and to dimensional changes that may occur with changes in moisture content.
Maximum lateral resistance and safe design load values for small-diameter (nails, spikes, and wood screws) and large-diameter dowel-type fasteners (bolts, lag screws, and drift pins) were based on an empirical method prior to 1991. Research conducted during the 1980s resulted in lateral resistance values that are currently based on a yield model theory. This theoretical method was adapted for the 1991 edition of the National Design Specification for Wood Construction (NDS). Because literature and design procedures exist that are related to both the empirical and theoretical methods, we refer to the empirical method as pre-1991 and the theoretical method as post-1991 throughout this chapter. Withdrawal resistance methods have not changed, so the pre- and post-1991 refer only to lateral resistance.

Keywords: Joints, mechanical properties, fasteners, testing, metals, nails, spikes, wood moisture, moisture, screws, bolts, nuts, strains, stresses, timber joints, staples, connectors, strength, resistance, wood strength, moisture content, joists, dimensional stability, timber connectors, nail holding properties, screw holding properties

Publication Review Process: Informally Refereed (Peer-Reviewed)

Date posted: 06/21/2010

This publication is also viewable on Treesearch:  view
RITS Product ID: 36166
Current FPL Scientist associated with this product
Rammer, Douglas R.
Research General Engineer
  

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