concrete placement. At the time of concrete placement all steel shall be
free from loose, flaky rust, scale (except tight mill scale), mud, oil,
grease or any other coating that might reduce the bond with the concrete.
3.1.1
Hooks and Bends
Steel bars, except for zinc-coated or epoxy-coated, shall be mill or
field-bent. Zinc-Coated and epoxy-coated bars shall be mill-bent prior to
coating. All steel shall be bent cold unless authorized. No steel bars
shall be bent after being partially embedded in concrete unless indicated
or authorized.
3.1.2
Welding
Welding of steel bars will be permitted only where indicated or authorized.
Welding shall be performed in accordance with AWS D1.4 except where
otherwise specified or indicated.
3.1.3
Placing Tolerances
3.1.3.1
Spacing
The spacing between adjacent bars and the distance between layers of bars
may not vary from the indicated position by more than one bar diameter nor
more than 25 mm. 1 inch.
3.1.3.2
Concrete Cover
The minimum concrete cover of main reinforcement steel bars shall be as
shown. The allowable variation for minimum cover shall be as follows:
MINIMUM COVER
VARIATION
150
mm
plus 13 mm
100
mm
plus 10 mm
75
mm
plus 10 mm
50
mm
plus 6 mm
38
mm
plus 6 mm
25
mm
plus 3 mm
19
mm
plus 3 mm
MINIMUM COVER
VARIATION
6
inch
plus
1/2
inch
4
inch
plus
3/8
inch
3
inch
plus
3/8
inch
2
inch
plus
1/4
inch
1-1/2
inch
plus
1/4
inch
1
inch
plus
1/8
inch
3/4
inch
plus
1/8
inch
3.1.4
Splicing
Splices in steel bars shall be made only as required. Bars may be spliced
at alternate or additional locations at no additional cost to the
Government subject to approval.
SECTION 03201
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