Steel channel and hollow block floor slabs
The domestic and light industrial floor market in South Africa comprises a system known as the rib and block floor slab. This is a concrete composite system consisting of in situ concrete and prestressed precast ribs. Construction entails the placement of ribs at regular intervals, which span betwee...
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| Published in: | Structural engineer (London, England : 1988) Vol. 83; no. 10; pp. 30 - 34. |
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| Main Authors: | , |
| Format: | Journal Article |
| Language: | English |
| Published: |
17-05-2005
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| Online Access: | Get full text |
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| Summary: | The domestic and light industrial floor market in South Africa comprises a system known as the rib and block floor slab. This is a concrete composite system consisting of in situ concrete and prestressed precast ribs. Construction entails the placement of ribs at regular intervals, which span between supporting elements. Non-structural hollow blocks are then placed between the precast ribs as void formers. The ribs are propped and in situ concrete is poured to create a 'T' section creating a 1-way spanning trough slab. The system is noted for its speed of construction and formwork is not required. However, transportation costs of the ribs and the need for lifting equipment renders the system uneconomic beyond a limited radius from the precasting factory site. To minimise costs, a new system is proposed in this paper - the precast rib is replaced with a cold-formed lipped steel channel. A set of design equations, adapted from the South African code (SABS 0100 - which is primarily a reproduction of the British Standard BS 8110 with some minor changes), are compared with a set of experiments. Results indicated the proposed system is a viable alternative, but embossment or a means to mechanically bond the concrete to the steel is required to achieve composite action. |
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| Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
| ISSN: | 1466-5123 |