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1.3 There are two Types of DTIs covered by this specification, Type 1 and Type 2.

1.3.1 Type 1 DTIs are suitable for comparatively large bearing surfaces.2 Type 1 DTIs are available in Grades 55 and 105, which differ in the amount of tension they indicate at a prescribed gap (see Table 1).

TABLE 1 Acceptable Range of Compression LoadA

DTI
Nominal
Diameter
(in.)

Mean Compression LoadB Range
in Pounds (lbs)

Mean Compression LoadC Range
in Pounds (lbs)

Grade 5

Grade 8

Grade 55

Grade 105

1/4

2200 to 2450

3100 to 3450

. . .

. . .

5/16

3500 to 3850

4950 to 5500

. . .

. . .

³/8

5300 to 5850

7500 to 8300

. . .

. . .

7/16

7200 to 7900

10 100 to 11 200

. . .

. . .

1/2

9700 to 10 700

13 700 to 15 340

4450 to 4900

8500 to 9400

9/16

12 350 to 13 600

17 400 to 19 200

5700 to 6300

10 900 to 12 050

5/8

15 550 to 17 200

21 850 to 24 200

7050 to 7800

13 500 to 15 000

³/4

22 600 to 25 000

31 900 to 35 300

10 500 to 11 600

20 000 to 22 150

7/8

30 850 to 34 100

43 550 to 48 100

14 500 to 16 000

27 650 to 30 550

1

40 200 to 44 400

56 700 to 62 700

19 000 to 21 000

36 250 to 40 100

11/8

45, 100 to 49 850

73 150 to 80 900

23 950 to 26 450

47 300 to 52 300

11/4

56 550 to 62 550

91 750 to 101 450

30 400 to 33 600

59 850 to 66 150

1³/8

69 350 to 79 750

112 450 to 124 250

38 550 to 42 600

73 800 to 81 600

11/2

83 350 to 92 150

135 150 to 149 400

44 050 to 48 700

89 300 to 98 700

15/8

. . .

. . .

55 800 to 61 700

106 200 to 117 400

1³/4

121 850 to 134 650

177 850 to 196 500

59 550 to 65 850

124 600 to 137 750

17/8

154 550 to 170 800

206 050 to 227 750

75 550 to 83 500

144 500 to 159 700

2

160 050 to 177 200

236 850 to 261 750

78 650 to 86 950

165 800 to 183 300

21/4

208 400 to 230 350

277 900 to 307 100

102 050 to 112 750

212 900 to 235 350

21/2

256 500 to 283 500

379 600 to 419 600

125 400 to 138 600

240 550 to 265 850

 

Document History

  1. ASTM F2437-14


    Standard Specification for Carbon and Alloy Steel Compressible-Washer-Type Direct Tension Indicators for Use with Cap Screws, Bolts, Anchors, and Studs

    • Most Recent
  2. ASTM F2437-12

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    Standard Specification for Carbon and Alloy Steel Compressible-Washer-Type Direct Tension Indicators for Use with Cap Screws, Bolts, Anchors, and Studs

    • Historical Version
  3. ASTM F2437-11


    Standard Specification for Carbon and Alloy Steel Compressible-Washer-Type Direct Tension Indicators for Use with Cap Screws, Bolts, Anchors, and Studs

    • Historical Version
  4. ASTM F2437-06


    Standard Specification for Carbon and Alloy Steel Compressible-Washer-Type Direct Tension Indicators for Use with Cap Screws, Bolts, Anchors, and Studs

    • Historical Version