RCS
Shaft
Size
(inches)
Helix
Plate
Thickness
(inches)
Helix
Diameter
(inches)
Working
Capacity
(lbs)
Theoretical
Installation
Torque
Required
To Attain
Working
Capacity
(ft-lbs)
Approximate
Torque at
Which Shaft
Will Begin to
Twist
(ft-lbs)
Maximum
Torque
Capacity
of Shaft
(ft-lbs)
Design
Strength of
Standard
Bracket
(lbs)
1 1/2”
3/8”
1/2”
3,600 6,000 60,000
8
10
12
14
8-10
10-12
8-10-12
8
10
12
14
8-10
10-12
8-10-12
17,500
10,000
10,000
10,000
20,000
20,000
30,000
27,500
25,000
24,900
21,125
50,000
49,800
(74,700) Note 1
3,500
2,000
2,000
2,000
4,000
4,000
6,000
5,500
5,000
4,980
4,255
(10,000) Note 2*
(9,960) Note 2*
(14,940) Note 2*
Note 1: Capacity is limited to 60,000 lbs due to maximum capacity of bracket
Note 2: Maximum torque capacity is 6,000 ft-lbs, so maximum working compressive or tensile load is limited to 30,000 lbs
* This condition is controlling condition Working Capacity=(Installation Torque x 10)/2

RCS
Shaft
Size
(inches)
Helix
Plate
Thickness
(inches)
Helix
Diameter
(inches)
Working
Capacity
(lbs)
Theoretical
Installation
Torque
Required
To Attain
Working
Capacity
(ft-lbs)
Approximate
Torque at
Which Shaft
Will Begin to
Twist
(ft-lbs)
Maximum
Torque
Capacity
of Shaft
(ft-lbs)
Design
Strength of
Standard
Bracket
(lbs)
1 3/4”
3/8”
1/2”
6,000 10,000 60,000
8
10
12
14
8-10
10-12
8-10-12
8
10
12
14
8-10
10-12
8-10-12
17,500
15,000
13,750
11,250
30,000
27,500
41,250
35,000
32,500
27,500
25,000
(65,000) Note 1
55,000
(82,500) Note 1
3,500
3,000
2,750
2,250
6,000
5,500
8,250
7,000
6,500
5,500
5,000
(13,000) Note 2*
(11,000) Note 2*
(16,500) Note 2*
Note 1: Capacity is limited to 60,000 lbs due to maximum capacity of bracket
Note 2: Maximum torque capacity is 10,000 ft-lbs, so maximum working compressive or tensile load is limited to 50,000 lbs
* This condition is controlling condition Working Capacity=(Installation Torque x 10)/2