Flying to a New Position

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Flying to a New Position

The flying tables are placed by crane into a new position in the bay between four or more adjacent columns or walls (step 1, Fig­ure 4.5). The flying table is then lowered and placed on cribbing dollies (step 2, Figure 4.5). The adjustable extension legs are then extended to set the tables to the desired grades (step 3, Figure 4.5). Fillers are then placed over the columns to cover the space between columns and flying tables. Also, reinforcing steel, electri-

Flying to a New Position

7. Land Form on (Cribbed) Dollies

 

Cribbing Dollies

 

y ‘ 5. Roll Out Form

From Bldg.

————- Rig Deck Forn

 

4. After Concrete Has Cured, Lower to Forn Glides

 

Tilting Forn Glides

 

3. Set to grade Jacks installed Concrete Poured

 

Jacks

 

Balan

 

2. In Place on Cribbing Dollies

 

1, Flying to Next Level

 

Подпись: Copyright © Marcel Dekker, Inc. All rights reserved.

Figure 4.5 Flying formwork cycle.

 

cal and mechanical components, and any other services are in­stalled. Concrete is then placed for slabs and parts of the columns.

Lowering and Stripping

 

After the concrete gains enough strength, the process of stripping the flying tables begins. Stripping of flying formwork is carried out

 

Flying to a New Position

by lowering the aluminum trusses and the attached deck (step 4, Figure 4.5). Lowering of the aluminum trusses can be per­formed by several hydraulic jacks. Hydraulic jacks are placed and fit under the bottom chord of the aluminum trusses to hold the table in place while the extension legs are retracted back. Hydrau­lic jacks are then used to lower the flying table onto its roll-out units.