threading the nut against the bearing plate.
2.1.13
Anchors
ASTM A 615/A 615M, ASTM A 996/A 996M, ASTM A 36/A 36M.
2.1.14
Dowels
ASTM A 615/A 615M, ASTM A 996/A 996M, ASTM A 36/A 36M.
2.1.15
Anchor Head
Anchor head shall consist of steel bearing plate with nut. Anchorage
devices shall be capable of developing 95 percent of the guaranteed
ultimate strength of prestressing steel. The anchorage devices shall
conform to the static strength requirements of Section 3.1.6 (1) and
Section 3.1.8 (1) and (2) of PTI A. [Threaded anchorage items for epoxy
coated bars shall be designed to fit over the epoxy coating and maintain
the capacity of the prestressing steel.]
2.1.16
Mechanical Anchors
[CID A-A-1922][FS A-A-1923][CID A-A-55614], galvanized unless otherwise
indicated. Provide sleeve anchors of the length and diameter indicated.
Minimum concrete embedment shall be as shown. Design values listed shall
be as tested according to ASTM E 488.
a.
Minimum [ultimate][allowable] pullout value shall be
[_____]kN
[_____]lb.
b.
Minimum [ultimate][allowable] shear value shall be
[_____]kN
[_____]lb.
2.2
ACCESSORIES
2.2.1
Stitching staples
ASTM A 615/A 615M, bar size as shown, with legs bend for embedment as shown
on the drawings.
2.2.2
Neoprene Bearing Pads for Precast Units
Molded or extruded polychloroprene, containing reinforcing carbon black,
zinc oxide, accelerators, antioxidants, vulcanizing agents, and
plasticizer. Pads shall be of the sizes indicated on the contract
drawings. The characteristics of the neoprene bearing pads shall meet the
following requirements:
Test Method
Physical Test
Test Value
Specification
Tensile Strength
8.3 mPa (minimum)
ASTM D 412
Elongation at Break
450 % (minimum)
ASTM D 412
300 % Modulus
6.2 mPa (minimum)
ASTM D 412
Durometer Hardness
Shore Type A
45 to 55 (50 Average)
ASTM D 2240
Water Absorption
5 % by Weight (maximum) ASTM D 471
Compression Set
30 % (maximum)
ASTM D 395
Tensile Strength
80 % (minimum of tensile
SECTION 03931
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