of this specification. 9-08, LEAD DOOR AND STEEL FRAMES: a. General: Where indicated on the drawings, Contractor is to furnish and install lead door and steel frames as detailed on H & N Drawing 3C-5628 Details D. E. F. and G. and according to these specifications. b. Construction: Door shall consist of steel frame capable of holding lead sheets and shall swing on fabricated steel pipe hinge all welded construction. Frame shall be fabricated from angles welded together at all corners. This frame shall be braced with angles welded as shown on drawings. Lead sheets shall be supported by 4-3/4 round bars spaced horizontally through door frame as shown on drawings. ¢c. Lead sheets will be furnished by user. Hinges: Shall consist of one 5 inch round sched- ule No. 40 x of long pipe sleeve welded to top of door frame and one 5 inch round schedule No. 40 x 12 inch long pipe sleeve welded to bottom of door frame and become an integral part thereof. Complete door assembly shall swing on a fixed pivot consisting of a 4 inch round schedule No. 40 pipe welded to a 10" x 1" x 10" base plate at the bottom and penetrating a 16" x 1" x 1'-6" plate at the top. Both top and bottom plates shall be embedded in concrete as shown on the drawings. d. Paint: All doors and hinges including all fabricated parts shall after fabrication be painted as per paragraph 9-06 e. of this specification. 9-09. VAULT DOORS: a. General: Where indicated on the drawings, Contractor shall furnish and install insulated flat sili fire- resistive vault door bearing Underwriters' Laboratories four-hour fire-resistive label, Underwriters' Laboratories relocking device label and Safe Manufacturers' National Association label for four-hour dqor. Relocking device shall be designed to function under mechanical explosive or torch attack. This dgor shall be as manufactured by the Mosler Safe Company, or its equal. b. Construction: high by 32" wide. plate welded to Clear door opening shall be 78" The door shall have 1/8" outer door jambs and shall be insulated with monolith- ic fire-resistive material. Baffles in door designed to prevent penetration of heat. In addition, the door shall 9-3