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A FEW tests have been made at the Building Research Station on short span reinforced brick masonry beams, such as might be used for lintels, and the results are thought to be of sufficient interest to justify publication, even though the investigation by itself is not comprehensive enough to warrant any definite pronouncement as to the reliability of this form of construction under all practical conditions.
F.G. Thomas and L.G. Simms
Mr. B. Rhodes: Mr. Longbottom has done less than justice to large diameter strand, by which I mean 28 mm (1 1/8 in) diameter strand. I know it is not used a lot, but this is really because of lack of effort on the part of the manufacturers and the system suppliers. 28 mm diameter strand has certain basic drawbacks, namely:
1. The shape of the load/extension curve
2. Relaxation losses at 6 per cent
3. Lower grip efficiencies
4. The tendency to fly open when cut
5. The 'banana' effect at the ends
Mr. J. E. C. Farebrother (F) : I have been asked to open this discussion in my capacity as Chairman of the Steering Committee of the LUCID organization. Len Jones has thanked almost everybody except himself and I would like to do that on behalf of the LUCID members.