• For tubular dowels , provide nonmetallic or epoxy coated metallic caps on the ends of the tube that do not exceed the outside diameter of the tube, and prevent intrusion of concrete or other materials.
• Submit structural adequacy testing according to PTM No. 642 showing a maximum Linear Variable Differential Transformers (LVDT) differential deflection for dynamic and static loading, for both the approach and leave sides of the joint of not more than 7.5 mils at 1 million cycles and not greater than a 2.5- mil increase in the LVDT differential deflection at 10 million cycles from the corresponding 1 million cycle LVDT deflection. The differential deflection is the absolute difference in deflection between the loaded and unloaded sides of the joint.
Table A – High Performance Dowel Bar Requirements Dowel Surface Material Configuration Solid Bar or Tube Material Cladding or Coating Material Material Minimum Wall Thickness (in.) Material Minimum Wall/Coating Thickness (in.) Stainless Steel Solid Bar Stainless Steel(1) ― ― ― Clad Bar Steel(2) ― Stainless Steel(1)(4) 0.04 Clad Tube Steel(2) 0.12 Stainless Steel(1)(4) 0.04 Solid Tube Stainless Steel(1) 0.12 ― ― Zinc Clad Clad Bar Steel(2) ― Rolled Zinc Alloy(5) 0.04 Clad Tube Steel(2) 0.12 Rolled Zinc Alloy(5) 0.04 Glass Fiber - Reinforced Polymer Coated
or Tube Steel(2) ― GRFP(3) 0.125 Multi -Layer Epoxy Coated Coated Bar or Tube Steel(2) ― Minimum 2 Coats of Epoxy(6) 0.02 Notes:
dowels, and ASTM A249 for clad tubular dowels meeting one of the following UNS Designations: S31603, S31653, S31803.
of 60 kips per square inch or higher for tubular dowels.
firmly hold the GFRP dowel bars in the Load Transfer Unit. Provide clips to positively secure the GFRP dowels to the Load Transfer Unit. Do not weld GFRP dowel bars to Load Transfer Unit.
to ASTM A934 for the first epoxy coating layer and an abrasion resistant second epoxy layer passing NACE TM0215 using 110 pound weight, and the Smooth Cut Carbide Bit gouge tool with a maximum gouge depth of 17.3 mils. Provide a total non -abraded epoxy coating thickness of 20 mils to 60 mils. Zero holidays are allowed.