Single-bevel butt weld with broad root face
Applied to joint
Butt joint — plates aligned end to end
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Equipment for groove welds
MIG and TIG machines suited for groove weld preparations on plate.
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Description
A single-bevel preparation with an extended root face. Combines the economy of a single-bevel (one member prepared) with the fit-up benefits of a broad root face.
In plain English
One plate bevelled, but with a generous land left at the root -- like a single-bevel version of the Y-prep. Gives you the best of both worlds: only one plate to prep, and a solid root face to prevent burn-through. You will see this on heavier T-joints and corner joints where the root side is inaccessible.
Symbol position
Modified half-V with land indicator on the reference line.
Size notation
Root face, groove angle, and root opening dimensioned as per single-bevel.
Common uses
- Heavy T-joints welded from one side
- Corner joints on thick plate
- Joints where backgouging is not possible
- Structural connections with limited access
