Item Code. Stainless Steel bars also available. More Views. To develop load transfer across a joint, dowel bars are arranged at specified intervals and at mid-depth of the pavement thickness. Physical Requirements: Dowel bars supplied by Mar-Mac Wire Company will meet the following â¦ Grade: IS, ASTM A615 Grade 60, Grade 250: Length: 100 mm to 5000 mm: Diameter (mm) 16 â 50: Diameter (inches) 5/8â³ â 2â³ Application at Pavement & Construction Works. Precon Products, A leading national independent supplier of construction products On the other hand, regarding the length of dowel bars, it should not be too long because the induced stress at the end of long dowel bars is insignificant and is not effective in transferring loads between adjacent concrete panels. Dowel bar insertion usually occurs after the vibrator but before the tamper bar. Higher proof strength of 500 N/mm²and 650 N/mm²are available. The dowel bar assemblies are to be securely fixed to the subgrade by using metal pins to eliminate displacement by the plastic concrete (Figure 7-3). Dowels perform the important job of load transfer between adjacent concrete slabs. The dowel deflection, bending moment and shearing were analyzed for dowel bars under the traffic loading, dowel length based on the second inflexion distance was computed and a relationship between dowel length and dowel diameter was established. We can supply and manufacture dowel pins in mild steel, brass, stainless steel 303 and stainless steel 316, as well as Hardened & Ground Steel. Dowel bars always inserted in the mid-depth of the slab. 7-4 Figure 7-3. Dowel Bars can be supplied in various diameters with sawn end to specific lengths. They are placed over joins in concrete slabs in order to prevent cracking. Dowel Bar Sizes Stocked: 12mm x 900mm Dowel Bars 16mm x 600mm Dowel Bars 20mm x 600mm Dowel Bars High-grade PVC Dowel Sleeve Sizes Stocked: Diameter: 12mm, 16mm, and 20mm Length: 300mm - 450mm Stainless Steel bars also available. The purpose of dowel bars is to transfer loads across a joint without restricting joint movement due to thermal contraction and expansion of the concrete. DBC25/100: 25mm Expansion Dowel Caps: £1.23. A 20mm dowel bar cap will fit over a 20mm reinforcing bar. ASTM A615 Grade 60 Steel Stainless steel dowel bars. DBC32/100 : 32mm Expansion Dowel Caps: £1.62. Dowel Bar Specification: Steel Standard: ASTM A615, ASTM A1678, ASTM A775, 854449, AASSITO M254 : Ends: Chamfering & Plain Through CNC driven Machine Cut. In accordance with the Highwayâs Agency Series 1000, Clause 1011 specification our polymeric and epoxy coated dowels provide good anti-corrosion qualities complying with the specifications salt spray test in accordance with BS.EN ISO 9227:2006 Useful downloads. They increase load transfer efficiency by allowing the leave slab to assume some of the load before the load is actually over it. We are able to offer expansion and contraction joint dowel bar cages, these are made to order. The dowel bars are either coated or made up of stainless steel to protect it from corrosion. Specification and Installation of dowel bars. 20 x 500mm Dowel Bar Mild Steel. Polymeric Dowel Bars and Epoxy Coated Dowel Bars We are the premier fusion bonded polymeric and epoxy coated dowel bar specialist in the UK. Price. 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