
    North American Iron & Steel Co., Inc., Plaintiff, v. Isaacson Steel Erectors, Inc., Defendant and Third-Party Plaintiff-Respondent. United States Fidelity & Guaranty Company et al., Third-Party Defendants-Appellants. (And a Fourth-Party Action.)
   Munder, Acting P. J., Martuseello, Latham and Shapiro, JJ., concur; Benjamin, J., dissents and votes to affirm the judgment insofar as appealed from.  