196 Welding Print Reading Figure 15-15. The degree of finish or weld smoothness is indicated by a number that specifies (in microinches) the roughest surface acceptable for this particular application. The larger the number, the rougher the surface permitted. A 125 surface is smoother than a 250 finish. The symbol is seldom used. 125 Figure 15-16. More than one type of weld is specified for this joint. Note how both weld symbols are included on the symbol. RP S S P S R Symbol Desired weld Combination fillet and groove weld with specified root opening. Figure 15-14. When the face contour of a weld is to be finished mechanically, a symbol (letter) with the appropriate finish technique is included with the fillet weld and face contour weld symbols. Chipping Grinding Hammering Machining Rolling Peening P R M H G C Method Symbol Example C G H M R P Figure 15-17. A part requiring a combination fillet and bevel weld for fabrication. R S D S Combination fillet and bevel weld with specified root opening. Desired weld Symbol D R S