A. General:
1. Structural Steel: See ASTM A 7-56-T.
2. Design, Fabrication and Erection: See AISC Manual 1956.
B. Beams and Girders:
1. Connections:
a. Design to carry superimposed loads.
b. Rivet weld, or bolt.
2. Bearing: On walls, minimum, four inches (4").
3. Bearing Plates:
a. Design to distribute load, minimum thickness, five- sixteenths inch (5/16").
b. Bed in Portland cement mortar.
c. Plates may be omitted under wide flange type steel beams if width of flange provides sufficient bearing area so that allowable compressive stress of supporting material is not exceeded.
4. Paint Beams With Two (2) Coats of an Acceptable Metal Protective Paint: This is in addition to shop paint. For crawlspace construction, painting shall be completed before installing floor joists and before foundation inspection. Beam ends shall be grouted in foundation wall pockets.
C. Columns:
1. Material:
a. Standard shape, steel or cast iron.
b. Concrete-filled steel pipe, new material, standard weight or heavier.
c. Boiler tubing not acceptable.
2. Bases and Caps: Steel or cast iron.
a. Caps: Rivet or bolt to steel girders; spike or lagscrew to wood girders.
b. Bases: Anchor by bolts or imbed in concrete.
3. Shims: Metal. Loose shims not acceptable. Maximum of two and one-fourth inches (21/4"). (Ord. 0-71-12, 3-11-71)