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DRAWINGS AND SPECIFICATIONS - page 16 / 41

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1.

Steel Reinforcement:  [ASTM A 615/A 615M, Grade 60 (Grade 420)] [ASTM A 706/A 706M], deformed.

Use epoxy coating where corrosive environment or severe exposure conditions justify extra cost.  ASTM A775 is a bendable coating while ASTM A934 is a non-bendable coating.

D.

Epoxy-Coated Reinforcing Bars:  ASTM A 775/A 775M or ASTM A 934/A 934M, as follows:

Select type of reinforcement to be epoxy coated from subparagraph below.

1.

Steel Reinforcement:  [ASTM A 615/A 615M, Grade 60 (Grade 420)] [ASTM A 706/A 706M], deformed.

E.

Steel Bar Mats:  ASTM A 184/A 184M, assembled with clips, as follows:

Select type of reinforcement for mat fabrication from subparagraph below.

1.

Steel Reinforcement:  [ASTM A 615/A 615M, Grade 60 (Grade 420) [ASTM A 706/A 706M], deformed bars.

Select only one of the paragraphs and subparagraphs below to suit steel reinforcement requirements.  If retaining “Performance Requirements” Article, consider reviewing selections with fabricators.

F.

Plain-Steel Welded Wire Reinforcement:  ASTM A 185, fabricated from [as-drawn] [galvanized and chromate wash treated] steel wire into flat sheets.

G.

Deformed-Steel Welded Wire Reinforcement:  ASTM A 497, flat sheet.

H.

Epoxy-Coated-Steel Welded Wire Reinforcement:  ASTM A 884/A 884M Class A coated, [plain] [deformed], flat sheet, [Type 1 bendable coating] [Type 2 non-bendable coating].

I.

Supports:  Suspend reinforcement from back of mold or use bolsters, chairs, spacers, and other devices for spacing, supporting, and fastening reinforcing bars and welded wire reinforcement in place according to PCI MNL 117.

2.4  PRESTRESSING TENDONS

Retain this Article if precast concrete units will be prestressed, either pre-tensioned or post-tensioned.  ASTM A 416/A 416M establishes low-relaxation strand as the standard

A.

Prestressing Strand:  ASTM A 416/A 416M, Grade 270 (Grade 1860), uncoated, 7-wire, low-relaxation strand.

B.

Un-bonded Post-Tension Strand:  ASTM A416/A416M with corrosion inhibitor conforming to ASTM D1743, Grade 270 (Grade 1860), 7-wire, low-relaxation strand with polypropylene conduit sheath.

2.5  CONCRETE MATERIALS

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