2016-01-18_REPORT - M1977493

• Permit No: M1977493
• IBM Index Class Name: REPORT
• Doc Date: 1/18/2016
• Doc Name: Asbestos Disposal Shaft Closure Report
• From: Climax Molybdenum
• To: DRMS
• Email Name: ECS
• Media Type: D
• Archive: No

SPECIFICATION NUMBER:
Climax Molybdenum CONCRETE CONSTRUCTION 03 30 00 SPE
A Freeport-McMoRan Company TECHNICAL SPECIFICATION PROJECT NAME:
CAVR Shaft Closure Project
F. Form Removal
1. Forms shall be designed and constructed for removal without damage to
concrete.
2. Forms and shoring shall not be removed until the concrete has attained
sufficient strength to support its own weight and any construction or storage
loads to which it may be subjected. In general the forms around the raised
edge of the concrete shaft plug may be removed 24 hours after completion
of placement.
G. Tolerances
1. The top of the shaft plug shall be finished with a tolerance of+ 1/4-inch
within specified elevation and with a variation from level of 1/4-inch in any
10 feet.
H. Reinforcing Steel
1. Installation of reinforcing steel shall be in accordance with ACI 318 and the
Design Drawings. Reinforcing steel shall not be bent or straightened in a
manner injurious to the steel. Bars with kinks or bends not indicated on the
Drawings shall not be used in the work. The use of heat to bend or
straighten reinforcing steel shall only be authorized if specifically approved
in advance by the Engineer. Before placement, reinforcing steel shall be
thoroughly cleaned of loose or flaky rust, mill scale, or coatings of any
foreign substance that would reduce or destroy the bond. Reinforcing steel
reduced in section shall not be used in the work. Steel shall be placed where
indicated on the Design Drawings. In the event of a substantial work delay,
previously placed reinforcing steel left for future bonding shall be inspected
and cleaned. Field splices, will not be allowed for the straight reinforcing
bars in either mat, as indicated on the Design Drawings.
2. The circular reinforcing hoops shall be welded, as shown on the Design
Drawings.
3. Prior to placing any reinforcing steel in thick mats (i.e., over 2'-0" thick),
the Contractor shall design an adequate reinforcing steel support system to
hold reinforcements for these mats to proper position as shown on the
Design Drawings. The Engineer will inspect and/or review Contractor's
support system prior to placing the reinforcing steel.
Concrete Covering over Steel Reinforcement
114-910345 CONCRETE CONSTRUCTION
Climax CAVR Shaft Closure Project 03 30 00 SPE-16