DWR
STRUCTURAL CONCRETE REINFORCING

Products


• Meet the ASTM-A-496 & A-497, IBC 1903.5, ACI 318, AASHTO M221 & M225 standards
• Are tested and certified in our on-site testing laboratories by experienced quality control teams

Structural Quality

 

  • All wires are cold rolled, positively deformed and pre-straightened
palanquilla
  • Prior to fusion welding, individual wires are sheared to required strength
  • Precise and permanent spacing
  • Optimal shrinkage and separation crack control
  • Consistently remains on plane within specified clearances
  • Resists curling due to fusion welded intersections
  • Minimize misplaced steel incidents after inspections
  • Reduced liability for all involved parties

Crack Control

 

1. Random cracks are minimized and separation is eliminated by rigidly welded reinforcing steel wire elements parallel to any random cracks.

2. Positive (raised) deformation combined with welded wire intersections assures superior concrete bond strength.

3. Total product square footage acts as an integrated unit.

Description and Nomenclature

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    “31” is the cross-sectional
area of the wire in square
inches times 100
 
16x12 “D31” refers to a deformed wire with cross sectional steel area of 0.31 inches square.  
Defines the spacing of the wires in each direction measured in inches, 16” for one direction and 12” for the other. “D” means the wire is deformed (when the wire is plain or smooth a W will be written).    

General Technical Code References and Design Aids TOP TOP

Steel Wire Deformed and Deacero Wire Reinforcing (dwr) are both defined as deformed reinforcement in the International Building Code section 1903.5 (2003 Edition) and in various sections of ACI 318 (2005 Edition).

Steel wire must meet ASTM-A-496 requirements and ACI Section 3.5.3.4, allowing the use of wire on specific yield strengths to Grade 80 provided the design yield stress corresponds to a strain of 0.35%.
Also, Dwr must meet ASTM-A-497 requirements and ACI Section 3.5.3.6.

Construction codes and specifications

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INTERNATIONAL BUILDING CODE (IBC)

Deformed steel wire, and welded deformed steel wire reinforcement, are both generally defined as Deformed Reinforcement in International Building Code (2003 ed.), Sections 1903.5. and specially, in various sections of ACI 318 (2205).
Steel wire, defined as the cold-rolled wire material before it is welded into a wire reinforcement mat, shall conform to ASTM-A 496 spec, and ACI Section 3.5.3.4, which allows the use of wire with specified yield strengths to Grade 80, provided the design yield stress correspond to a strain of 0.35 %.
Welded and deformed steel wire mats shall conform to ASTM-A 497 spec, and ACI Section 3.5.3.6. Also, supplements S1 of ASTM-A 496 detail the use of this “High Yield Strength” wire.
The requirements on development length for welded deformed wire mats are defined in ACI Sections 12.2, 12.7, and 12.8. Also, sections 12.7.2 and 12.18.1 define deformed wire reinforcement lap splices that are commonly referred to as “mesh laps”.

Beam / Girder Stirrup Tie “Cage” applications conform to ACI Section 11.5.2, which allows design yield strength of 80,000 psi Grade 80, for shear reinforcement, when using deformed wire only in stirrup tie cages. Also, ACI Section 12.13.2.3, allows the use of simple “U-stirrups” for beam applications with two longitudinal, development wires, at 2” o.c. spacing, near the top of each stirrup leg.
For Mild Reinforcing applications, the minimum area of temperature and shrinkage reinforcement may be reduced when using steel with design yield strength greater than 60, 000 psi, per ACI Section 7.12.2.1.
For Wall applications, ACI Sections 14.3.2 and 14.3.3, detail requirements for the ratio of reinforcing steel to gross area of concrete for deformed dwr.

ASTM

The ASTM standards that govern the production of deformed wire reinforcement are: A 496, which defines the standards for the wire used, and A 497, which governs the material after final fabrication. ASTM-A 496 Supplement S1 defines the requirements for high yield strength wire (in excess of 60,000 psi).

IBC (2003) / ACI 318 (2005)

ACI 318 (05) - “Building Code Requirements for Structural Concrete” also defines and governs the use of deformed wire reinforcement in concrete construction. The appropriate ACI sections match the IBC (03) sections as listed previously without the 1900 prefix. The IBC “global” reference to all concrete reinforcing is 1903.5. ACI 318 adds commentary and sketches that are not included in the IBC sections. This commentary is very effective in describing the details, design, and utilization of deformed welded reinforcement material.

AASHTO

The corresponding AASHTO Materials Standards which cover deformed welded reinforcement are M 225 for the wire used within it, and M 221 for finished and pre-fabricated mats.

NOTE: Upon request, detailed project specific submittal documentation for conversion to deformed welded reinforcement, in lieu of loose rebar, slip dowels, or small diameter smooth wire fabric, will be provided by dwr.