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TIMBER  CONNECTORS - 14071_27
STRUCTURAL STEEL SHAPES - 14071_29

Engineering Aid 2 - Intermediate Structural engineering guide book
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Figure  1-29.—Toothed  ring  and  toothed-ring  joints. Figure 1-30.—Embedding toothed rings. be  used  for  wood-to-wood  connections  (view  C).  When making a wood-to-wood connection, the fabricator first cuts a depression into the face of each of the wood members. These depressions are cut to the same depth as the shear plates. Then a shear plate is set into each of the depressions so that the back face of the shear plate is flush with the face of the wood members. Finally, the wood members are slid into place and bolted together. Because  the  faces  are  flush,  the  members  easily  slide into position, which reduces the labor necessary to make the connection. Shear plates are available in 2 5/8- and 4-inch diameters. For special applications,  toothed rings and spike grids are sometimes used. The toothed ring connector Figure  1-31.—Spike  grids  and  spike-grid  joints. (fig.  1-29)  functions  in  much  the  same  manner  as the  split  ring  but  can  be  embedded  without  the necessity  of  cutting  grooves  in  the  members.  The toothed ring is embedded by the pressure provided from   tightening   a   high-tensile   strength   bolt,   as shown   in   figure   1-30.   The   hole   for   this   bolt   is drilled slightly larger than the bolt diameter so that the bolt may be extracted after the toothed ring is embedded.   The   spike   grid   is   used   as   shown   in figure  1-31.  A  spike  grid  may  be  flat  (for  joining flat  surfaces),  single-curved  (for  joining  a  flat  and a   curved   surface),   or   double-curved   (for   joining two  curved  surfaces).  A  spike  grid  is  embedded  in the same manner as a toothed ring. STRUCTURAL  STEEL Structural  steel  is  one  of  the  basic  materials commonly used in structures, such as industrial and commercial  buildings,  bridges,  and  piers.  It  is  produced in a wide range of shapes and grades, which permits great flexibility in its usage. It is relatively inexpensive to manufacture and is the strongest and most versatile material available to the construction industry. This 1-16







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