Structural Steel Erection
-A load shall not be released from its hoisting line until the solid web structural members are secured at each connection with at least two bolts (of the same size/strength as indicated in the erection drawings) and drawn wrench tight
-Steel joists or steel joist girders shall not be placed on any support structure until the structure is stabilized
-When steel joist(s) are landed on a structure, they shall be secured to prevent unintentional displacement prior to installation
-Floors must be planked at every other story or 30 feet, whichever is less
-A floor must be installed within two floors below any tier of beams on which erection, riveting, bolting, welding, or painting is being done; otherwise, fall protection is required.
-Fall protection is required when workers are connecting beams where the fall distance is greater than two stories or 30 feet, whichever is less
Note: at heights over 15 feet. and up to 30 feet, workers performing connecting operations must wear personal fall protection that gives them the ability to tie off.
-During work other than connecting operations, fall protection is required where the fall distance is greater than 15 feet
-Before any steel erection begins, the controlling contractor must provide the steel erector written notifications related to concrete strength and anchor bolt repair/replacement
-Prior to removal of planking or metal decking, all employees must be instructed in the proper sequence of removal and safety
-Requirements for the working area where floor openings are to be uncovered:
a. The area must be in the exclusive control of steel erection personnel and shall be barricaded to prohibit unauthorized entry.
b. The floor area adjacent to the floor opening shall be barricaded or the floor opening shall be covered when not attended by steel erection personnel.
c. Floor openings shall be guarded by either temporary railings and toeboards or by covers.
d. Covers shall:
1. Be capable of safely supporting the greater of 400 pounds or twice the weight of the employees, equipment, and materials that may be imposed on any one square foot area of the cover at any time.
2. Have not less than 12 inches of bearing on the surrounding structure.
3. Be checked by a qualified person prior to each shift and following strong winds.
4. Never be removed by walking forward where the walking surface cannot be seen.
5. Bear a sign stating, “OPENING—DO NOT REMOVE”, in 2 inches high, black bold letters on a yellow background.
-Permanent Flooring-Skeleton Steel Construction in Tiered Buildings (Unless the structural integrity is maintained by the design 1710(k)):
a. There shall be not more than eight stories between the erection floor and the uppermost permanent floor.
b. There shall be not be more than four floors or 48 feet, whichever is less, of unfinished bolting or welding above the foundation or uppermost permanently secured floor.
- All columns must be anchored by a minimum of four anchor bolts
Exception: when columns are braced or guyed to provide the stability to support an eccentric load as specified in 1710(f)(1)(B).
Note: persons engaged in steel erection should review and be knowledgeable of all the requirements contained in section 1710.