Fabricating should follow recommendations in ASTM A-385 especially concerning venting. Any venting provided by V and S may be an extra charge. Material must be free of weld slag, paint, varnish, and paint/grease pencil marks.
Internal vented handrail holes 75% ID of pipe.
External vented handrail holes 25% of the ID of pipe
Galvanizing will be done in accordance with ASTM A-123, ASTM A-153, as applicable.
Gusset plates crop corners.
Steel chemistry should be selected according to ASTM A-385, Part 3.