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BLDG2021-High Rise Bldg Construction (T3, 2025)
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A 100-tonne crawler crane is required to lift a load 6.5m tall to a position 30 m above the surface on which the crane is operating, and 12 m away from the centre of the crane. The length and weight of the block, hook, and slings that are required to attach the hoist rope to the load are 7 m and 1800 kg respectively. The site layout requires the crane to pick up the load at a distance of 29 m from the centre of rotation of the crane. Based on table provided, determine the maximum load that can be hoisted.
The curtain wall of the Chase Tower was blown off during the Hurricane Ike. Interestingly only panels in the lower part of the tower were damaged, while wind speed is generally higher in higher elevation. What is the key lesson learnt of this case study?
Which of the followings statements below are true about mast climbers?
I. The instability of the mast climber during dismantling is one of the common factors of incident when using a mast climber.
II. Mast climbers are quicker to erect and dismantle compared to scaffolding.
III. The risk of personal injuries, such as shoulder and lower back injuries, is reduced since a mast climber can be adjusted to an optimum working height.
IV. Mast climbers require more space on site than scaffolding.
An electronic sensor part of the new mechanical system was installed on each facade panel on John Hancock Tower in Boston. How does the mechanical system work?
What are the compulsory facade tests specified in AS 4284? You can choose more than one answers.
Which equipment is the most efficient one to be used to spread soil dumped by trucks?
An earth fill (clay soil type), when compacted, will occupy a net volume of 800 cubic metres. How many cubic metres have to be excavated from its natural state to complete the work?
What is a spandrel panel in a high-rise building façade?
The following statements about tower crane are correct, except:
The following are the advantages of dry hire of equipment, except: