1. The document describes the sequence of activities to operate monorail and davit facade access systems. It outlines rigging, positioning, and operating procedures for cleaning buildings of different heights and architectural features. 2. Operating a low-profile davit system is labor intensive, requiring the manual repositioning of davits and cradles between each cleaning location. A high-profile davit launched from the roof is safer for taller buildings as it keeps the cradle restrained. 3. Proper planning is needed to provide clear routes for transferring equipment, address safety restraints, and allow cleaning of recessed or projected architectural features. Unrestrained dangling wires or cradles pose risks that must be mitigated through

1. Page 1 of 3
Sequence of activities to operate - Monorail and Davit systems as Facade Access Equipment & limitations
SI System Sequence of activities to operate
1 Monorail tracks
• Identify & fix the access locations to rig & de-rig the suspension wires in a safe manner to the trolleys mounted on
monorail
• Aligned to this location provide the cradle location at ground or landing level to rig-de-rig the suspension wires
• Provide clear & safe transfer route from designated cradle parking location to rigging point and vice versa.
• Power supply sockets either at roof top or near ground level
• Any facade below a projection will require distant cleaning using extended tools as the cradle vertical movement is
in a line from suspension point. No touch cleaning so no maintenance while suspended in cradle.
• Projected features limits the cradle ascent unless the monorail is aligned to allow cradle descent on such features.
Depending on the projection, the touch cleaning will not be possible and so will be the maintenance.
• Any facade in the recess of more than 600mm could be cleaned with long squeegee. Maintenance purpose access will
need another approach and equipment.
• Ceiling mounting options & turn tables combinations to change directions & access the complete ceiling with clear
access points to rig & de-rig suspension wires and cradle at ground level
• Cleaning operations starts from top to down. In case of building height of more than 40 m, it must be restrained at
every 20 m descent from suspension point. In most of cases the cradle is stored on the ground. In this case, the
suspension wires are unrestrained while lowering after connecting to the trolleys mounted on the track, the first ascent
of the cradle, the last descent of the cradle and removal of the suspension wires. This leaves the risk unaddressed of
dangling wires and unrestrained cradle getting swayed for foreseeable possible mishap/ incident.
• This could be addressed by providing swing brackets to place & secure the cradle just below the monorail track or
extending the track inside the building to cradle designated parked position. Or use of suction cups during cradle
unrestrained first ascent & final descent as a primitive choice. The suspension wires during rig and de-rig could be
managed tied to nylon rope and held at the ground level by an operator.
• In case the dangling wires issue remains unaddressed, it will keep rubbing against the facade causing nuisance to
residents at that location and damage to the facade in addition to an eye sore.

2. Page 2 of 3
Safety & Performance Factors of Access Equipment
SI System Sequence of activities to operate
2 Davits
• Labour intensive system as davits and cradle are moved manually between every location of operations.
• For low profile davits – provide clear and obstruction free route for davits transfer on roof between fixations
points (sockets).
• Clear, Levelled & obstruction free route for cradle transfer on ground all along the facade line.
• To operate cradle at every location, operators have to follow the list of actions summarised in Table below.
• In case of building height more than 40m, it keeps the threat of unrestrained dangling wires at every location
and cradle vertical movement open to mishap and incident.
• The maintenance cost is high due to constant damage of cradle wheels, electric cable etc.
• More time is spent on shifting than cleaning the facade.
• Parapet mounted options is suitable for parapet height of up to 1.2 m otherwise a platform is required to access
and shift the davits at higher parapet height. Safety must be addressed.
• Horizontal jib reach limitations
• For High profile davits – clear & obstruction free path is required at roof level only as the cradle launch is
from the roof top.
• The cradle is always restrained due to launch from roof top.
• Safer solution compared to low profile davits for buildings higher than 40 m as it addresses the restraint system
needs.
• Sliding/ Traversing davits – Comparatively longer jib is possible compared to manual davit system.
• Any facade in the recess of more than 600mm could be cleaned with long squeegee. Maintenance purpose need
another approach and equipment.
• Projected features limits the cradle ascent in case of high profile davits unless the jib reach is aligned to allow
cradle descent on such features. Low profile davits application not a workable solution in such scenarios and any
canopy areas.

3. Page 3 of 3
Operation Method Statement
Low profile Davit Monorail
1. Connect suspension wires to the davit
2. Fix movable davits in the socket
3. Tie nylon rope to the loose end of suspension wires and lower to the ground level for another
operator to hold it
4. Lower the suspension wire in a controlled manner one by one with one person holding and
collecting the nylon rope until the loose end of suspension wires is fully lowered and detach
from nylon rope
5. Position cradle on location of operation
6. Connect supply cable to cradle control box
7. Connect power supply
8. Guide the suspension wires through the safety locks, to the hoists opening
9. Operate hoists to insert steel wires in hoist mechanism
10. Guide suspension wire to wire winders and secure the loose end to the wire winder point meant
for this purpose
11. Wind the additional length of wires on reelers operating the hoists
12. Board the cradle
13. Carry out the safety procedures & checks before starting operation
14. Lift the cradle to the top and fix the top limit plates
15. Operate downward carrying out cleaning operation to the landing level
16. Land the cradle and move out of the cradle
17. Take out the suspension wires out of wire winders, hoists and then safety locks
18. Disconnect the power supply
19. Remove supply cable plug from the supply socket
20. Push the cradle to new location
21. Remove the suspension wires from davits
22. Detach and fix one davit to next location in the direction of next location
23. And follow the sequence defined above
Note: Another quicker & safer way of cradle shifting and connecting to the low-profile davits at
next location is by disconnecting the wires, tying to nylon rope and lower to collect in the cradle.
Shift the cradle to next location and pull the wire up one by one tied to nylon wire, connect to the
davit at next location and fix the buffer plate before operation.
In case of high profile davit, it is comparatively simpler eliminating numerous activities as the
shitting of davits and cradle takes place at roof.
1. Rig the wires to monorail trolleys thro’ designated
access
2. Lower the suspension wires one at a time tied to
nylon rope managed at ground by another operator
for controlled lowering
3. Position the cradle at location at ground level or
relevant level
4. Connect the power cable to socket (either at roof or
just above GL)
5. Connect power supply cable to control box in cradle
6. Guide suspension wires thro’ safety locks to hoists
7. Operate hoists and wind the suspension wires on the
wire winders
8. Carry out the safety procedures and checks
9. Lift the cradle to top position
10. Descend carrying out cleaning operation
11. Ascend to the top suspension point and move
horizontally to next location of use
12. Lower the cradle carrying out the cleaning operation
13. Ascend again to the top suspension point and move
horizontally to next location
14. On work completion lower the cradle resting on
lowest designated landing point or inside the building
in case of monorail track leading to parking area
inside the building and secure
15. Remove the wires in case cradle parked position at
ground
16. Disconnect the power supply and store the cradle at
designated location
17. De-rig suspension wires from trolleys
18. Store with care