2006 New York Code - Structural Steel Assembly.

 
    §  27-1034  Structural  steel  assembly.  (a)  Placing  of  structural
  members.
    (1) During the placing of a structural member, the load shall  not  be
  released from the hoisting rope until the member is securely supported.
    (2) Open web steel joists that are hoisted singly shall be transferred
  from  their  place  of  storage directly to their permanent location and
  safely secured. No load shall be placed on open web steel  joists  until
  they are permanently fastened in place.
    (b)  Tag  lines.  While  structural  members  or  assemblies are being
  hoisted, tag lines shall be used to prevent uncontrolled movement.
    (c) Erection of trusses. All trusses  shall  be  laterally  braced  or
  guyed as necessary for the safety of the structure.
    (d) Erection of frames. All structural frames shall be properly braced
  with  shores or guyed cables and turnbuckles as necessary for the safety
  of the structure.