
    433 A.2d 546
    McBurnie v. Columbus McKinnon Corp. v. Foster Wheeler Corp., Appellants.
    Argued November 12, 1980.
    Michael V. Gilberti, for Wheeler Corp., appellant; Arthur Cutruzzula, for McBurnie, appellee; Edward A. McFarland, for McKinnon Corp., appellee.
    Before SPAETH, WICKERSHAM and LIPEZ, JJ.
   The order of the lower court is hereby affirmed.  