Square groove weld
Two short parallel lines on the reference line: a square groove weld, one of the groove welds that join two members edge to edge.
How to read it
A groove weld is made by depositing filler metal in a groove between two members to be joined. The square groove is one of the standard groove welds, alongside the V, bevel, U and J grooves. India's IS 813:1986, which draws on ISO 2553, calls the same weld a square butt weld.
This explains what a symbol specifies on a drawing. It isn't welding instruction, and a drawing's own notes and the governing code take precedence.
Read next
- Next in Welding symbolsV-groove weldA V on the reference line: a V-groove weld, a groove weld made in a V-shaped groove between two members.
- The same shape in Blueprint symbolsStairsA staircase, seen from above. The arrow shows the direction of travel from this floor, labelled with the direction and the number of risers.
More welding symbols
The same shape elsewhere
Browse symbols drawn with arrows or lines.
Sources
- Steelworker, Volume 1, NAVEDTRA 14250, 1996, Naval Education and Training Professional Development and Technology Center, U.S. Navy (Internet Archive), Chapter 3, Drawings and specifications
- Welding Theory and Application, TM 9-237, 1967, Department of the Army (Internet Archive), Glossary
- Scheme of symbols for welding, IS 813:1986, Bureau of Indian Standards (Internet Archive, Public.Resource.Org), Table 1
Researched, edited and approved by Rory Hansen before publishing. Last reviewed September 25, 2026. How we research
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