N.H. Admin. Code § 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
Click here to view Image
(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.
Notes
#8494, eff 12-24-05; ss by #10155, eff 4-14-12
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