| 1. |
Which of the following should be considered in the preliminary design? |
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Lateral load-resisting systems. |
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Framing plans. |
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Preliminary member sizes, including floor thicknesses. These may be based on span-to depth ratios, the charts in this Guide or a preliminary structural design carried out to confirm proposed sizes. |
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Control of volume change deformations and restraint forces. |
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Connection concepts. |
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None of the above |
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All of the above |
| 2. |
Which of the following should be considered to confirm if the project is economically viable? |
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Architectural appearance. |
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The standard of quality and the broad requirements for the structure. |
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How the structure will perform and how it is to be built. |
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Preliminary cost estimate. |
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All of the above |
| 3. |
The thickness of the floor zone ________than the overall depth of the floor system. It includes the depth required for any floor finishes, set downs or set ups, falls, and the depth required to accommodate below floor building services. |
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is not grater |
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is greater |
| 4. |
Figure 1 is: |
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Piping installation. |
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AC duct work. |
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Typical floor zone. |
| 5. |
In modern buildings the floor zone may often include: |
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air conditioning ductwork and fan coil units |
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ventilation and exhaust ducts |
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sanitary floor traps and waste pipes |
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stormwater waste pipes, hot and cold water |
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fire water and sprinklers |
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smoke detectors |
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data and electrical cabling |
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lighting and many other specialist services |
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All of the above |
| 6. |
Services need to move horizontally along and across the floor and vertically from floor to floor in a building without clashing. The architect, structural designer and the services designer __________ liaise closely to ensure that services such as ducts, cables and the penetrations for the services do not jeopardize the structural behavior of the floor system or the operation of the building.
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should |
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should not |
| 7. |
Designers should appreciate that deflection _________ as important as strength in the structural design of concrete floors, particularly in the design of shallow reinforced concrete floors systems. Special attention should be given to the proportioning of the floor system for deflection before the final design. |
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is just |
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is not |
| 8. |
Cantilevers are often used for balconies and along the external edge of a building to balance the internal span and/or improve the shear capacity at edge and corner columns Figure 5. Regardless of the floor system chosen they always need careful consideration. Cantilevers are usually limited to a span of about _______ of the back span and should be supported by a stiff support such as a beam or column. |
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25 to 35% |
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40 to 60% |
| 9. |
Traditionally, concrete floor systems are reinforced using bars, fabric or using high-strength strand which is stressed. The action of prestressing with a straight or a draped cable in concrete enables the applied loads to be balanced by the uplift force so that practically no deflection results. This is a significant benefit in long-span floors as it eliminates the need to camber formwork or to provide deeper reinforced concrete sections. |
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True |
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False |
| 10. |
Figure 10 Shows: |
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A reinforced concrete floor. |
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Flat plate floor system. |
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Beam and slab system. |
| 11. |
Which one of the following are advantages of beam and slab? |
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Traditional effective solution. |
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Long spans. |
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Both of the above |
| 12. |
Which one of the followings are disadvantages of beam and slab? |
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Penetrations through beams for large ducts difficult to handle |
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Depth of floor |
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Greater floor-to-floor height. |
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All of the above |
| 13. |
Which one of the followings would be considered as advantages of Band Beam and Slab? |
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Relatively simple formwork |
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Shallow beams to allow services to run under the floor |
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Minimum structural depth and reduced floor-to-floor height |
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Long spans |
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Good cost/time solution |
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Allows the use of flying forms. |
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All of the above |
| 14. |
Which one of the following would be disadvantages of band beam and slab? |
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Long-term deflection may be controlling factor and post-tensioning may be required |
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May need service penetrations through beams which are difficult to handle. |
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Both of the above |
| 15. |
In which of the following conditions would solid slabs be chosen? |
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The loading results in high shear or there are heavy point loads. |
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The environment is aggressive, for example in splash zones or where condensation may occur over water. |
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High cover or special concrete is required. |
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Projecting reinforcement requires the units to be wet-cast, for example when used as a soffit beam to support hollowcore. |
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All of the above. |
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