Iron and Steel Work

IRON AND STEEL WORK "Shop Drawings—The Contractor is to sub mit copies of all shop drawings to the Architect for approval, and no work is to be started unless such drawings are submitted to and approved by the Architect in writing.

"Settin.

All the iron and steel work is to be set in the very best manner; all bearings are to be full and true, the Contractor providing all necessary scaffolding, trestling, shores, and braces that may be required. In all cases the work must be bolted and riveted together as it progresses. All channels, beams, and girders are to be set level; and all columns must be set per fectly plumb and in alignment.

"The Contractor must do all necessary cut ting and drilling that may be required for other mechanics, and is to finish after them.

"Paintin.

All iron and steel work must be properly cleaned from rust and cinders, before paint is applied.

"All iron and steel work is to be painted on all sides, with two good coats of best red lead paint. One coat is to be applied and allowed to dry before the work is delivered at the building; and the second coat is to be applied after the work has been erected, except the cast-iron col umns, which are to receive both coats at the building.

"Steel Beams and Girders—All steel beams and girders are to be of the sizes and weights for supporting floors, sidewalks, walls, etc., shown on the drawings.

"All steel is to be in accordance with the requirements of the standard specification gov erning the physical properties of structural steel adopted by the Association of American Steel Manufacturers." If the work were large and important, and required any amount of special shapes or special work, a more careful specification, would have to be made for the steel. Men tioning the standard specification as adopted by the Association of American Steel Manu facturers, is, however, sufficient in this case.

"All framing is to be done in the very best manner, and standard connection and diameter bolts are to be used.

"All the girders carrying the floor beams are to rest on the columns and piers; to be bolted to the columns by means of bolts. See

details on thawing No. ." The drawings should show this, thereby making this clause superfluous.

"All beams and girders resting on walls are to be provided with anchors as directed.

"Cast Iro.

All cast iron is to be of the very best quality grey iron; and all castings are to be sound and perfect, free from blow-holes, honey combs, cinders, cold chutes, seam marks, and other imperfections. All castings which are not first-class in every respect will be rejected.

"Cast-Iron Column.

All columns are to be of cast iron, to be true and straight, and must have a uniform thickness of metal. The ends are to be faced off at right angles with their axes. All to have lugs, brackets, and seats for beams and girders, and must be true and without a flaw. Brackets, lugs, etc., are to be cast on the columns to support the girders and wooden beams as shown on drawing No. .

"The ends of the columns are to have flanges of the same thickness as the shell of the columns through which they are to be bolted together by means of four bolts; all flanges are to be circular.

"All

bolt-holes are to be drilled.

"All the columns must be put up plumb, and no shimming or wedging will be allowed.

"All the columns are to be drilled, two holes in opposite sides of the column, four feet from the bottom, to ascertain the thickness of the shell.

"Cast-Iron Column Bases—All the basement and sub-basement columns are to rest on cast iron bases, to be cast with flanges, ribs, webs, and rings, as shown. The thickness of shells is to correspond with that of the columns. The top flanges are to be not less than inches thick; to have bottom plates and ribs; and all to be of such sizes as shown on schedule drawing No. .

"The flanges on which the columns rest are to be faced off in a lathe.

"All column bases are to be firmly bedded on the foundations with Portland Cement mortar, without wedging. The mortar to be supplied by the iron Contractor.