Section Inst 603.06 - Design Procedures for Concrete Block Piers(a) Frame piers less than 36 in. high shall be: (1) Permitted to be constructed of 3 single core or solid concrete blocks 8 inch x 8 inch x 16 inch; and(2) Installed so the long sides are at right angles to the I-beam, as set forth in Figure 600-1: Figure 600-1 Pier Installation, Single Concrete Block
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(b) All piers over 67 inches shall be designed by a licensed New Hampshire architect or engineer.(c) Piers for exterior wall openings shall be constructed of blocks that are 8in. x 8in. x 16 in.(d) Perimeter piers shall be installed parallel to the perimeter, when required by the manufacturer's installation instructions.(e) Piers required at marriage line supports, perimeter piers and piers at exterior wall openings shall be permitted to be constructed of single open or closed-cell concrete blocks 8 in. x 8 in. x 16 inches to a maximum height of 54 inchesPiers over 54 inchesbut less than 67 inchesneed to be solid grout filled and reinforced with 2 pieces of #5 reinforcement bar as set forth in Figure 600-2: Figure 600-2 Pier Installation, Double Concrete Block
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(f) Manufactured piers shall be listed and labeled and installed to manufacturer's instructions.N.H. Admin. Code § Inst 603.06
#8494, eff 12-24-05; ss by #10155, eff 4-14-12