Formwork for Concrete Structures by R.L.Peurifoy and G.D- By EasyEngineering.net

420 Chapter Fifteen
Downloaded From : www.EasyEngineering.net
Railings
Post
Toeboard
Catwalk workdeck
Slipform workdeck
Double joists
1 / 2 " ø bolt
Wire rope slings
ww.EasyEngineering.n
Catwalk bracket
- by scanada -
Wire rope slings
(1) 7 / 8 " ø
bolt
Slipform
Railings
Post
Toe board
Finisher’s workdeck
FIGURE 15-4 Details of working floor and scaffold assembly for slipforms. (Source:
Scanada International, Inc.)
of the forms. If the jacks are overloaded, the upward movement of
sections of the forms may not be uniform, which can cause distortions
in the concrete structure. Usually, the jacks should be spaced
from 6 to 8 ft apart along a wall.
A hydraulic jack is illustrated in Figure 15-2. A smooth steel
jack rod, its lower end in the concrete, passes upward through the
Downloaded From : www.EasyEngineering.net