What are the necessary items to review when planning a post tension operation?

Source excerpt

# §1711. Reinforcing Steel and Post-Tensioning in Concrete Construction. (cont.) (C) Has placed control and responsibility for the protective covers on another contractor other than the reinforcing steel contractor. NOTE: to subsection (f)(2)(A) through (C): The responsibilities of the controlling contractor related to accepting the control and custody of protective covers does not relieve the individual employer or subcontractor from protecting their employees from impalement hazards in accordance with the provisions of Section 1712(c). (g) Requirements for Hoisting and Rigging Reinforcement Assemblies. (1) A qualified rigger (a rigger who is also a qualified person) shall inspect the rigging prior to each shift and the handling of loads shall be in accordance with General Industry Safety Order, Section 4999. (2) Routes for suspended loads shall be pre-planned to ensure that no employee is required to work directly below a suspended load except for: (A) Employees engaged in the placing or initial connection of the reinforcement assemblies; and (B) Employees necessary for the hooking or unhooking of the load. (3) When working under suspended loads, the following criteria shall be met: (A) Materials being hoisted shall be rigged to prevent unintentional displacement; (B) Hooks with self-closing safety latches or their equivalent shall be used to prevent components from slipping out of the hook. (4) All loads shall be rigged by a qualified rigger. (5) All lifting devices below the hook such as spreader bars used for hoisting pre-assembled cages, walls, columns, beams and other structures shall be designed, load rated and fabricated under the direction of a California registered professional engineer. (6) The controlling contractor shall prohibit all activities under or in the hazard area of hoisting operations, including unloading and staging areas for reinforcement assemblies. (h) Post-tensioning Operations. The controlling contractor shall: …

Source excerpt

# §1711. Reinforcing Steel and Post-Tensioning in Concrete Construction. (cont.) Post-tensioning Operations. A method of stressing reinforced concrete in which tendons running through the concrete are tensioned after the concrete has hardened. Qualified Person, Attendant, or Operator. A person designated by the employer who by reason of training, experience, or instruction has demonstrated the ability to safely perform all assigned duties and, when required, is properly licensed in accordance with federal, state, or local laws and regulations. Qualified Rigger. A rigger who meets the criteria for a qualified person. Reinforced Concrete. A composite material in which the concrete provides the material's compressive strength, while the reinforcing in the form of additional embedded material provides the tensile strength and/or ductility. Reinforcing Ironworker. A worker primarily engaged in the hoisting, rigging, field fabrication, moving, and installation of reinforcing steel assemblies, members, post-tensioning cables, and related equipment. Reinforcing steel activities include, but are not limited to: off-loading and material handling of reinforcing components; fabrication, pre-assembly, and placement of reinforcing steel columns, beams, joists, mats, welded wire mesh, and curtain-walls; and the placement of post-tensioning cables. Reinforcing Steel Assemblies. Vertical and horizontal columns, caissons, walls, drilled piers, mats, and other similar structures. For purposes of this standard, reinforcing steel includes rods, bars, or mesh made from composite and/or other materials. Reshores. The temporary vertical supporting members that are placed or left in place when the original supporting shores or posts for the formwork are removed. The reshores are used to support partially cured concrete and other construction loads. Slip Form. A form that is moved as concrete is placed and slides without being detached to form walls or other concrete structures. Str…

Source excerpt

# §1711. Reinforcing Steel and Post-Tensioning in Concrete Construction. (cont.) EXCEPTION: to subsection (h)(5): Where the adjoining structure or other structural space constraint precludes the installation of exterior platforms. (A) The work platform required in subsection (h)(5) shall include guardrails and toeboards meeting the requirements of Section 1621, and shall be kept clear of any debris or materials not related to the stressing or de-tensioning operation. (6) Ensure stressing equipment is secured to prevent accidental displacement during operation. (7) Ensure stressing equipment calibrations per contract specifications shall be available on site. Prior to stressing, a competent person shall verify the adequacy of the stressing equipment calibrations. (8) Ensure a competent person shall inspect the stressing equipment for damage or defects before stressing operations begin, and periodically during the stressing operations. The use of stressing equipment shall conform to the manufacturer's instructions and recommendations. (9) Ensure methods shall be employed to insure that supporting forms, falsework or shoring does not fall due to cambering of the concrete during the stressing operations. Dead loads and construction loads (including those due to stressing) shall be considered in the design of the forms, falsework, and shoring. (i) Fall Protection. - Employees shall not be permitted to place or tie reinforcing steel in walls, piers, columns, etc., more than 6 feet above an adjacent surface, unless a personal fall protection system is used in accordance with Section 1670 or other method affording equivalent protection from the hazard of falls from elevated surfaces. - EXCEPTION: Reinforcing ironworkers may travel point-to-point horizontally or vertically on reinforcing steel up to 24 feet above the surface below providing there are no impalement hazards. (j) Formwork and falsework stability shall be provided in accordance with Sections 1713 …