SRP Specification, Load Calculation, Do's & Don'ts, RSP, Rope Suspended Platform, Safety

1. ROPE SUSPENDED PLATFORM
(RSP)
Prepared & Presented by
Shiva K, ME(ISE),ASP®

2. Rope Suspended Working Platform
Technical Classification
Type ZLP 630 ZLP 800
Rated Load Kg 630 800
Lifting Speed m/min 9.3+-0.5 8.2+-0.5
Dimension of Platform
(Length*Width*Height)
mm (2000*3)*690*1180 (2500*3)*690*1180
Weight of the Platform (3 units) Kg 310 386
Weight of the Hoist Kg 50*2=100 54*2=108
Weight of the Electric Control Box Kg 15 15
Weight of the Counter Weight Kg 900 (25*36 Pcs) 1000 (25*40 Pcs)
Wire rope dia mm 8.3 8.6

3. Rope Suspended Working Platform
Technical Classification

4. Rope Suspended Working Platform
Technical Classification
• Minimum load bearing strength for keeping suspension bracket
unit is 1500Kg/Sq. m.
• Should not to operate if wind speed exceed 40 Km/hr.
• Ensure to maintain 150 LX illumination during night time.
• The minimum distance to be maintained between tow adjacent
RSP is 0.5 m

5. Rope Suspended Working Platform
PPE & Operator Qualification
PPE
• The person should wear Helmet, Safety Shoes & Full body safety
harness
• Rope grab fall arrester with life line must for each person
• Proper tying arrangement is required for tying the life line where
the bracket is placed
Operator Qualification
• The person should undergo pre medical checkup
• The person should trained by P&M dept.
• Always keep the operator ID card while working in RSP.

6. Structural diagram of RSP

7. Structural diagram of RSP

8. Schematic diagram for counter weight and
suspension mechanism

9. Suspension bracket units kept on terrace
Suspension unit - 2
Suspension unit - 1
Stay rope
Front Beam
Counter weight blocks
Rear Bracket
Front Bracket

10. Anti sliding lock
U-clamps
U-clamps
Over hoist
limit switch
Suspension bracket units kept on terrace

11. Two eye turn buckle fixed in stay rope
Turn buckle hook with latch

12. Counter blocks protected with lock & chain
to prevent unauthorized removal

13. Schematic Diagram of Safety Lock

14. Safety Wire Rope
Anti tilting
limit switch
Working wire rope
Hoist Motor
Manual
Descending Lever
Safety Lock & Hoist Motor

15. • Wire rope end to be properly spliced
• Bulldog grip should be always in live end and clamp should be in
dead end.
• Minimum three U-clamps to be fixed
• Eye should be protected with thimble.
Quantity, distance & installation of rope
clamp

16. • W1 – Total weight of the counter weight
• W2 – Weight of the platform + Rope & Hoist + Person & material
• a – distance between front bracket and rear bracket
• b – length of front extension beam
• The moment in the center bracket towards the counter bracket is always three times
grater than the towards suspension platform.
• The front beam extension length should not exceed 1.7 mts.
Safe Working Load calculation
W-1
W-2
a b
(W1 * a) (W2 * b)> 3

17. Sample Calculation
• Total weight of the counter blocks (W1) = 1000 Kg.
• Grass weight of the suspended platform (W2) = 860 kg.
Weight of the platform – 310 kg.
Weight of Hoist – 50*2=100 Kg.
Weight of the safety lock & accessories– 20*2 = 40 Kg.
Weight of the persons (3 members) – 210 Kg.
Weight of the material – 200 kg.
• Extension length of front beam (b) – 1.3 mts.
• Distance between the front & rear brackets (a) – 4.0 mts.
W1 * a >= 3 (W2 * b)
(1000*4) / (860*1.3) >= 3
3.6 >= 3

18. Rope Suspended Working Platform
Do’s
• Ensure working load must be within 80% of rated load
• If erected RSP in road or passage ensure barricade, warning signs
with watch person.
• Daily inspection by P&M engineer
• Ensure daily cleaning (not to allow debris on platform & wire
ropes)

19. Rope Suspended Working Platform
Dont’s
• Do not run the RSP with full load
• Do not use as a hoisting machine for shifting any materials
• Erect always 10m away form the high voltage line
• Do not operate under rainstorm, thunderstorm, dense fog and heavy snow
• It is prohibited open out swing windows area
• Prohibited to operate by a single person
• It is absolutely prohibited to access from floor when hanging the platform.
• It is prohibited to carry any explosive material such as compressed gas
cylinders.
• Do not tie the life line rope in the suspension bracket

20. Rope Suspended Working Platform

21. Rope Suspended Working Platform

22. Rope Suspended Working Platform
Technical Classification

23. Overhead protection arrangement

24. Overhead protection arrangement without disturbing fall
arresting system