Archive for May 2012

Spread Footing Foundation

Photo Credit: Alex Mead

Seen here are three rebar cages for the spread footings of a large building. Spread footing foundations are preferred to deep foundations. This is due to the increased work, and therefore increased cost, of a deep foundation. Deep foundations could use H-piles, micro-piles, or other options to support the building. For the design of a foundation, the bearing capacity of the soil or rock and the column loads of the proposed building must be understood. If the size of the footing can be made feasibly, given the loads and bearing capacity of the project, spread footings will be used.

Building Demolition

Photo Credit: Alex Mead

Seen here is the demolition of Campbell Hall on The University of California – Berkeley campus. Three machines are being used for this activity: a man lift, a traditional excavator, and an ultra high demolition excavator. Demolition of a building in this setting is high risk due to the possibility of debris falling out of the site boundaries. In order to minimize this possibility, great care is taken by the operator of the ultra high demolition excavator. Also, dust generated by the demolition is unacceptable in an environment like a college campus. Therefore on this project three fire hoses are used from varying angles to keep the dust in control.