Can anyone explain this weld symbol?

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I am having a difficult time making a determination on the weld symbol per the attached shop drawing. Please let me know if you can identify the welding requirement. I appreciate any assistance!Thx,MBC_QC MGR. Attached ImagesEP01 - WELDS.pdf (51.8 KB, 461 views)
Reply:That is a little confusing.  The Joint designation BC-P2-S signifies a Butt/Corner joint, Partial penetration using a singe V-groove, using submerged arc welding.The '3/4 (3/4)' should be on the left side of the symbol indicating size of preperation and weld size.  Heres where it gets interesting.  Looking at the drawing it seems like they would want a fillet weld there.  Don't see how its possble to get a singe v-groove in the joint.  Maybe a single bevel, but not a single V.   I would ask for clarification.  Also the allowable welding positions for that joint designation is flat only unless your WPS indicates otherwise.Hope that helps.Jay DavisAWS-CWIC-60 Specialty Welding ContractorLoving husband, and father of two boys (
Reply:Unclear/non-standard wedling symbol usage AFAIK.  Have to ask the customer/boss WTF they actually mean/want.note - Non-standard dimensioning scheme not meeting ANSI Y14.5M, possible dimensional conflict based on tolerance stack-up depending on which order measurements are taken.  Thus, bad practice in dimensioning.1" thick plate, 4" tall and 19-1/4" long welded to the big 2-3/4" thick plate, check.Location and spacing of the ribs and studs onto the big plate, check. (mostly, see note above about dimensional variation and tolerance stack-up)But the weld symbol underneath the leader is calling out a 60 degree, single-bevel V-joint butt-weld on the arrow side???  For what looks like should be a fillet weld joining the 'ribs' to the base-plate.The stud welds are pretty easy to figure out what they want there.    Although, if I recall correctly, stud welding usually calls out either a WPS (weld parameters) or a 'performance spec' that the finished weld has to meet (pull-out, shear, bending, etc performance spec that has to be met).  The best laid schemes ... Gang oft agley ...
Reply:Originally Posted by MoonRiseUnclear/non-standard wedling symbol usage AFAIK.  Have to ask the customer/boss WTF they actually mean/want.note - Non-standard dimensioning scheme not meeting ANSI Y14.5M, possible dimensional conflict based on tolerance stack-up depending on which order measurements are taken.  Thus, bad practice in dimensioning.1" thick plate, 4" tall and 19-1/4" long welded to the big 2-3/4" thick plate, check.Location and spacing of the ribs and studs onto the big plate, check. (mostly, see note above about dimensional variation and tolerance stack-up)But the weld symbol underneath the leader is calling out a 60 degree, single-bevel V-joint butt-weld on the arrow side???  For what looks like should be a fillet weld joining the 'ribs' to the base-plate.The stud welds are pretty easy to figure out what they want there.    Although, if I recall correctly, stud welding usually calls out either a WPS (weld parameters) or a 'performance spec' that the finished weld has to meet (pull-out, shear, bending, etc performance spec that has to be met).
Reply:Originally Posted by jbyrdThat is a little confusing.  The Joint designation BC-P2-S signifies a Butt/Corner joint, Partial penetration using a singe V-groove, using submerged arc welding.The '3/4 (3/4)' should be on the left side of the symbol indicating size of preperation and weld size.  Heres where it gets interesting.  Looking at the drawing it seems like they would want a fillet weld there.  Don't see how its possble to get a singe v-groove in the joint.  Maybe a single bevel, but not a single V.   I would ask for clarification.  Also the allowable welding positions for that joint designation is flat only unless your WPS indicates otherwise.Hope that helps.