2011-226B.1 - Laserfiche WebLink

Home Browse Search

to I ti ( 1 ) That they are manufactured from cold drawn steel wire in accordance with the wire sizes and geometrical dimensions shown in the CRSI Manual of it Standard Practice , Chapter 3 , Table Il. (2) That the plastic used for protection of the steel legs has a thickness of 3 /32 inch or greater at points of contact with the form work. Provide plastic protection by a dipping operation, by adding premolded support or by molding plastic to the top wire of the support . Ensure plastic tips to the legs of the that the plastic material used for protection of steel legs does not chip, crack, deform, or peel under ordinary job conditions . Provide molded plastic legs that have sufficient strength to carry the weight of the supported reinforcing steel in its required position without deformation and relaxation under job conditions . 415-5 . 13 .3 Plastic Bar Supports and Spacers : Use non- stackable bar supports and spacers comprised of either reinforced or non-reinforced virgin or recycled plastic . Bar supports shall be able to meet the concentrated load requirements of 415 - 5 . 13 . 1 within a working temperature range of 20 to 150 °F . Spacers shall be able to withstand a 50 pound concentrated load applied as directed by the State Materials Office without bar slippage , permanent deformation or breakage within a working temperature range of 20 to 150 ° F with the deformation under a 50 pound load being less than 5 % of the support height . Alllastic rebar supports shall have a maximum water absorption of 0 . 5 % P at 14 days , as per ASTM D 570 . Protect plastic rebar supports from exposure to sunlight until placed in the form . Mold plastic rebar supports in a configuration which does not restrict concrete flow and consolidation around and under the rebar support. Do not use continuous legs or rails on concrete surfaces . Due to the wide range of applications and heights , ensure that the manufacturer additionally certifies all plastic bar supports for 2 inch, 3 inch, 4 inch and 4 1 /2 tit inch heights . Provide each individual bar support with an identification number unique to the particular model permanently marked on the surface as included in the Qualified Products List. 415-5 . 13 .4 Plastic Bar Supports and Wheel Spacers for Drilled Shafts : Wheel spacers shall be able to withstand a 500 pound concentrated load applied as directed by the State Materials Office without bar slippage, permanent deformation or breakage at room temperature with the deformation under a 500 pound load being less than 5 % of the support height. The perimeter surface of the wheel spacer shall be smooth. Bottom bolsters shall be able to withstand a 1000 pound concentrated load without permanent deformation or breakage at room temperature with the deformation under a 1000 pound load being less than 5 % of the support height. All plastic rebar supports shall have a maximum water absorption of 0 . 5 % at 14 days , as per ASTM D 570 . 415-5 . 13 .5 Qualified Products List : Use plastic bar supports and spacers listed on the Department ' s Qualified Products List. Manufacturers seeking evaluation of products for inclusion on the Qualified Products List must submit an application in accordance with 6 - 1 and include certified test reports from an independent laboratory showing that the plastic bar supports and spacers meet all the requirements specified herein . Plastic bar supports and spacers made of recycled plastic products must meet the additional requirements of Section 972 . - 141 - FPID ( S ) : 4231864 - 58 - 01