Table 5.4 No they didnt! or did they?

Date 10-03-2011 16:40

I need so of you more experienced CWI's to help me out here. The 2010 D1.1 has updated the old table 5.4. Now you need to refer to Tables 5.9 and 5.10. Anyway tell me if I'm reading this incorrectly. Hypothetical joint...(groove weld corner joint 1-1/4" thickness of thicker plate). So I look at tabel 5.9 then see schedule B on 5.10 and now (C) is convexity or concanity and for an 1-1/4" thickness we can accept a max 3/16" convexity or concavity? :eek:

Did I miss something on the 2008 D1.1 table 5.4? when has concavity been accpetable on a groove joint? Did we not use to call that "underfill"? I can't be intrupreting this right. Please help me out guys! These new figure-table combos are just laying out too much information. It's almost like an welding inspection for dummies excerpt.

By jwright650 (*****)

Date 10-03-2011 16:58

on Page 214 Fig 5.4 (B) C=0 is shown in the Acceptable sketch in the center. I don't see where it allows any underfill or concavity.

I take it that convexity can be allowed up to 3/16" Max and 0" Min. for plates greater than 1".(see Table 5.10 schedule B)

By FabsForLife (*)

Date 10-03-2011 17:15

well if you look on schedule B on pg 210 table 5.10 "C" = allowable convexity or concavity.

By jwright650 (*****)

Date 10-03-2011 17:36

C = 0 min dim and 3/16 max dim (tolerences), as does the root 0 min and unlimited max...see schedule B on Table 5.10

By jwright650 (*****)

Date 10-03-2011 17:38

BTW, I'm looking at D1.1:2010

By 803056

Date 10-03-2011 17:46

The terms convexity and concavity are reserved for fillet welds. In this case, a corner joint, "C" would be referring to the reinforcing fillet welds where they are used.

Groove welds are flush, they have face or root reinforcement, or they are underfilled. The term "R" is used to indicate reinforcement for the groove weld.

Best regards - Al

By jwright650 (*****)

Date 10-03-2011 18:09

I thought we were speaking about the inside corner joints(full pen groove welds, middle of the page) on page 214 Fig 5.4(B) which have an R and C dimn shown and then you have to go to the Table 5.10 on page 210 to see what those dimns are(min/max).

By FabsForLife (*)

Date 10-03-2011 19:54

Right J-dub an inside corner joint, groove weld (cjp). If you look at the lower pic with the backer bar welded from one side it does show the "C" dimension as if it was refering to the convexity of the reinforcing fillet. But if you see table 5.10 schedule B it does not specify if the "C" dimension is convex or concave. So I'm interpreting it due to the legend, it could apply to either. Does that make sense?

By FabsForLife (*)

Date 10-03-2011 17:41

I do see the tolerance min/max for "C" but I am refering to the legend in () which says C= allowable convexity or concavity. So does this mean we could use the tolerance 0 min and 3/16" max as a tolerance for both convexity and concavity? I'm confused.

By 803056

Date 10-03-2011 18:29