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15C-1.0105 and 15C-1.0106, shall be installed between the pier and steel I-beam. (See Figures <br /> A,B and D) <br /> (c) Center Line and Perimeter Piers: Center line piers shall be located at each end of <br /> center line and eight feet(8')on center, except where openings of four feet(4')or greater occur, <br /> piers shall be located on each end of the opening within six inches(6") of jamb studs or ridge <br /> beam posts. (See Figures A, B, C and D) Any openings fifteen feet(15') or larger in the exterior <br /> sidewall and/or marriage wall shall require blocking at each end of the opening with three(3) <br /> 4" x 16" x 16"pads(See Figure D). Piers shall also be installed on each side of any perimeter I <br /> door or fireplace. Bay windows or any opening forty-eight inches (48")or more shall require <br /> blocking at each end. Fourteen feet(14') or wider units with I-beam spread of less than <br /> eighty-two inches (82") and twelve feet(12')wide units with an I-beam spread of less than ', <br /> seventy-five and one-half inches (751/z") shall have perimeter blocking installed at a minimum of <br /> eight foot(8')on center. Piers shall not be required under the clear(open) spans between ridge <br /> beam posts. <br /> (d) All piers over thirty-six inches (36") and corner piers over twenty-four inches(24") in <br /> height shall be double tiered with blocks interlocked and capped with two (2)4"x 8" x 16" solid <br /> concrete blocks side by side and perpendicular to the I-beam or other material approved and <br /> listed by the department pursuant to rules 15C-1.0105 and 15C-1.0106, and cushioned with wood <br /> shims or pressure treated plate. Pier height is measured from top of footer or foundation to top of <br /> cement block stack, including 4" cap block(s). (See Figures B and D) <br /> (e) All piers over fifty-two inches(52") shall comply with local requirements. <br /> 9 <br />