Aws D1.4 Pqr Weld Length Chart Size
Aws D1.4-98
Aws D1.4 T-joint Detail
Aws D1.4 T-joint Detail

AWS D1.4/D1.4M:2005 1 1.1 Scope The code shall apply to the welding of: (1) Reinforcing steel to reinforcing steel, and (2) Reinforcing steel to carbon or low-alloy structural steel. When the code is stipulated in contract documents, conformance with all provisions shall be required, except for those provisions that the Engineer or contract docu.

One of the most common ways to reinforce concrete is with steel rebar. When a product design or rebar layout requires welding, it is important to know if the steel you are using can be welded. ASTM A706 weldable-grade rebar is acceptable for welding under most circumstances. But unless special analysis and precautions are taken, it is not acceptable to weld ASTM A615 steel. For ASTM A615 steel, you must be aware of the carbon equivalent. This requires a simple calculation based on information available on the steel mill certificate.

Steel is an alloy of iron, carbon and often other elements. Differing amounts of alloyants will create different properties in the resulting steel. Carbon, for example, is a hardening agent that will make steel stronger as it is added, but can also make the steel more brittle when present in excessive amounts.

AWS D1.4/D1.4M:2011 56 Sample Welding Procedure Specification (WPS) Form Welding Procedure Specification (WPS) No. Contractor.
AWS D1.4/D1.4M:2018 Structural Welding Code -Steel Reinforcing Bars This code covers the requirements for welding steel reinforcing bars in most reinforced concrete applications. It contains a body of rules for the regulations of welding steel reinforcing bars and provides suitable acceptance criteria for such welds.

The American Welding Society D1.4 Structural Welding Code for Reinforcing Steel states that the carbon equivalent for welded bars must be less than 0.45% for bars larger than #7 and less than 0.55% for #6 bars and smaller. The equation for calculating the carbon equivalent for ASTM A615 reinforcing steel is:

CE = %C + (%Mn)/6

%C and %Mn are listed on every mill certificate, and the carbon equivalent should be calculated for every mill certificate. Sometimes, the carbon equivalent may even be calculated on the mill certificate for you. An example mill certificate is presented below. The blue boxes show the %C and %Mn.

Example mill certificate showing %C and %Mn (highlighted in blue) for use in the carbon equivalent formula.

If your steel has a carbon equivalent that exceeds 0.45% for bars larger than #7 and 0.55% for #6 bars and smaller, you can still weld them, but you must preheat according to the calculated carbon equivalent. Table 5.2 in AWS D1.4 lists the minimum preheating temperatures based on the rebar diameter and carbon equivalent.

Understanding your reinforcement goes beyond just strength. It also involves being aware of the ingredients in your steel. Calculating the carbon equivalent is simple, but it remains an important factor in creating quality reinforcement.

More information on welding rebar is available in the September-October 2017 issue of Precast Inc. magazine.

Aws D1.4 Pqr Weld Length Chart Size

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Aws D1.4-98

This code covers the requirements for welding reinforcing steel in most reinforced concrete applications. It contains a body of rules for the regulations of welding reinforcing steel and provides suitable acceptance criteria for such welds.

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Aws D1.4 T-joint Detail

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