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Bridge Building Scaffold Case Study

Engineering Project: Oakland Bay Bridge
Skyway Project Oakland, CA
The objective of this project was to allow quick and easy transport of construction personnel from the ground to
the slip forms used on the construction of the peers. To minimize costs, the decision was made to access both the
east-bound and west-bound piers from one stair tower.
This was accomplished by attaching the stair tower to the
sky crane centered between the peers. Special gangways
were installed to ramp over to each slip form.

Engineering needed to account for the high wind
forces imposed on both the stair tower and gangways
and for the natural sway of the sky crane. Due to the
extra weight caused by the sway of the sky crane a
hybrid shoring/system scaffold frame was designed to
increase loading ability for the lower portions of the
stair towers.
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