Operation Instructions for ZLP250
Temporarily Installed Suspended Access Equipment
3
3.2Suspension Mechanism
The suspension mechanism is the heavy-duty steel frame structure fixed on the
top of the building as the supporting equipment. It is mobile, adaptable and easy to
erect and dismantle.
3.1.1
The suspension mechanism (see figure 2 as below) consists of front beam (1),
middle beam (4), rear beam (5), front base (2), rear base (6), upper column (8),
tommy bar (3), counter weight (7) and reinforce steel rope (9) etc. The tommy bar is
mounted on the front and rear base; the front and rear beams will be fixed through the
tommy bar, the middle beam is fixed between the front and rear beam. The upper
column is mounted on the tommy bar for fixing the reinforced steel rope and counter
weight will be placed on the rear base. For details of structure, see attached figure 1:
suspension mechanism.
Figure 2: Suspension Mechanism
1. Front beam 2. Front base 3. Tommy bar 4. Middle beam
5. Rear beam 6. Rear base 7. Counter weight 8. Upper column
9. Reinforcing steel rope 10. Turnbuckle
3.1.2
The configuration of the suspension mechanism shall meet the following
formula:
2
a
*
F
*
b
G
n
n------- Safety coefficient against overturning;
G------ Weight of counter weight in kg;
a------- Front beam overhang in m;
F------- Total weight in
K
g of the platform, hoists, electric control system,
safety lock, steel rope and rated load, plus wind pressure;
b------- Distance in m between the front base and rear base.
The permissible load should be adjusted according to the height, front beam
overhang, distance between the front base and rear base and other variables (see table
2 next page).