Communications Catalog (CA12042E)

Power-Installed Screw Anchors (PISA®)

Soil Class/Holding Capacity

1,000 lb

kN

50

222.4

1” High Strength Rod

45

200.2

AERIAL

40

177.9

INSTALLATION

12" Helix

1” Rod Strength

35

155.7

30

133.4

Twin 8" Helices

Twin 10” Helices

14" Helix

25

111.2

3 / 4 ” Rod Strength 5 / 8 ” Rod Strength

20

89.0

10" Helix

8" Helix

15

66.7

10

44.5

Predicted Holding Capacity

5

22.2

– 0 –

7

6

5

4

3

2

1

Chance ® Soil Class

Installation Torque/Holding Capacity

1,000 lb

kN 50 222.4 45 200.2 40 177.9 35 155.7 30 133.4 25 111.2 20 89.0 15 66.7 10 44.5 5 22.2 – 0 –

1” High Strength Rod

1” Rod Strength

12" or 14" Helix

Twin 8" or Twin 10" Helices

8" Helix

3 / 4 ” Rod Strength 5 / 8 ” Rod Strength

10" Helix

TOUGH ONE® Series

Predicted Holding Capacity

Mid-Strength Series Standard-Strength Series

ft-lb = N-m =

1000 1356

3000 4067

4000 5423

5000 6779

6000 8135

7000 9491

8000 10847

9000 12202

10000 13558

2000 2712

Installation Torque

Helix Diameter

Rod Diameter

Rod Strength

8”= 203.2 mm 10”= 254.0 mm 12”= 304.8 mm 14”= 355.6 mm

5/8”(0.625”) = 15.9 mm 3/4”(0.756”) = 19.1 mm 1”= 25.4 mm 1”High Strength = 25.4 mm

16,000 lb / 71.2 kN 23,000 lb / 102.3 kN 36,000 lb / 160.1 kN 50,000 lb / 222.4 kN

NOTE: Predicted ultimate holding capacities are based on results of extensive CHANCE ® tests and interpretation and are offered as an application guide only. They do not represent a guarantee of holding capacity in a particular soil class. A user must factor in his individual, appropriate safety factor. Torque values shown are steady values in homogeneous soils, not peak values that might occur in non-homogeneous soil. Torque values shown were obtained by averaging readings from the last 2 feet of anchor penetration. The anchor shaft must be aligned with the guy load to prevent premature failure of the rod. Under no circumstance should the rod and guy strand join at an angle of departure exceeding ± 5° on PISA anchors.

Page A4 | August 2022