Advantages of Jump Form Significant Reduction in Crane Time

Jump forming can reduce expensive crane time by less than one – half of that required for conventional gang forming used for wall

Advantages of Jump Form Significant Reduction in Crane Time

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

Advantages of Jump Form Significant Reduction in Crane Time

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

construction. This is accomplished simply by eliminating crane time normally required to support conventional gangs during final tie removal, formwork maintenance, and initial tie placement at the next lift.

It should be noted that all formwork operations such as strip­ping and resetting are crane independent; the crane is only needed for flying the jump form upward.

As indicated above, when forms are stripped by rolling back or tilting, a 30-in. (762-mm) clearance is allowed between the face of the form and the wall. This provides sufficient space to carry out such work as form stripping and cleaning, setting of reinforce­ment, and other wall maintenance in preparation for the next pour. A 30 in. (762 mm) wide working platform also allows removal of the jump shoe and patching, sacking, and even post tensioning operations if required.