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Screws
CHAPTER 7 CONCRETE  AND  MASONRY

Engineering Aid 3 - Beginning Structural engineering guide book
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Figure 6-86.-Driftpins (driftbolts). Driftpins  (driftbolts)  (fig.  6-86)  are  long, heavy, threadless bolts used to hold heavy pieces of  timber  together.  Corrugated  fasteners  (fig.. 6-87) are used in a number of ways; for example, to fasten joints (miter) and splices together and as a substitute for nails where nails may split the timber. Glue Glue,  one  of  the  oldest  materials  for  fastening, if  applied  properly,  will  form  a  joint  that  is stronger  than  the  wood  itself.  Probably  one  of the best types of glue for joint work and furniture construction  is  animal  glue,  made  from  hides. Other   types   of   glue   are   extracted   from   fish, vegetables,   casein,   plastic   resin,   and   blood albumin.  Glue  can  be  obtained  commercially  in a  variety  of  forms—liquid,  ground,  chipped, flaked,  powdered,  or  formed  into  sticks. Figure 6-87.-Use of corrugated fasteners. 6-51







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