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Illustration of spacer beam <br /> mm <br /> ru <br /> wrvu ,m <br /> u. <br /> f <br /> i: <br /> 1 <br /> 1 o, <br /> Treated spacer beam to consist of 4 x 4 blocks +/-5" high, placed 2' o.c. Treated 2 x 4 <br /> joint(s) to be centered over blocks—however, top and bottom 2 x 4 joints to alternate <br /> when possible. <br /> Spacer beams shall be placed on the existing edges of the 6' boardwalk, and a third down <br /> the center. The spacer beam shall be 8" in total height, and may be greater in areas if <br /> needed to level for the new decking, and less for the north 30' of the boardwalk. Shims <br /> to account for undulation in the surface of the existing boardwalk, shall be placed cinder <br /> the spacer beam such that the new S' decking shall be uniformly flat and screwed to the <br /> continuous new treated material of the top of the spacer beam. <br /> 6 1 F";0 �',„ C, <br />