Building Technology - selecting materials for floors and walls

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Calum Stringer                0600532


Steel stair construction has been selected. Provide a drawing of the section of one flight of stairs to Stairs 3, including the landings, to an appropriate scale to fit onto an A4 sheet.

(30 marks)

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Describe the performance requirements of platform flooring in the offices and select a suitable platform floor, with reasoning, for the offices. Provide a sketch to show the section of the platform floor with the floor and finish.

(35 marks)

A raised access flooring system is defined in Platform Floors (Raised Access Floors) - Performance Specification as “load bearing fixed or removable panels supported by adjustable pedestals to provide an under floor space for the housing and distribution of services” (PSA Specialist Services, 1992).

The functional requirements of the office floor structure will depend on whether it is ground or an upper floor. The floor is required to have sufficient load bearing capabilities without causing any undue deflection, sufficient fire resistance requirements for the building, thermal capabilities, adequate sound insulation, and for the (ground floor) damp proofing.

Performance factors will include things such as delivery and construction time, the availability of labour, the compatibility of the office’s construction, requirements for the layout and spacing, its cost and the fire legislation requirements.

The offices will have high requirements for platform flooring because of its many benefits, the platform floor creates a void under floor level that can allow building services to be installed or modified to the required areas. This can include the following: electrical, data and telecom cabling, heating or ventilation and its control, fire suppression and detection, security and water and drainage pipework.  By using the platform flooring it allows quick and easy access to these services for maintenance purposes and enables office layout changes.

The two categories of platform flooring systems are full and partial. Where the decked raised floor is continuously used but for only part of the floor, generally where cable are initially required, this is the partial access floor system. It is formed with individual boards or panels which are supported on pedestals and joists to a suitably determined height. These boards or panels are permanently fixed to the support therefore access to the void under the sub floor is restricted to areas of removable flooring or hatches.

Where the continuously decked raised floor is formed with separate panels this is known as full access floor systems which are supported on pedestals to a determined height. The panels are made to a standard size and are removable and completely exchangeable within the installed system.

The two types of platform flooring that I have looked into are the gravity laid and screw down systems with either a flooring cover constructed out of Calcium Sulphate Panels or Steel Encapsulated Wood Core Panels.

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Calcium Sulphate core is characteristically less vulnerable to variations in temperature and humidity than products with wooden cores.  This offers greater flexibility with installation and greater lateral stability at higher floor heights with the corner lock panel system. There are many finishes available to this type of material, for example carpet, PVC and integral HPL. It has a high load rolling capacity, good acoustic properties, is non-combustible, and the edging has a protective trim. It can be used in various locations with different types of traffic, including general and high density office areas and plant and server rooms.

Steel Encapsulated ...

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