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FERRO-CONCRETE WHARVES.

i SAO3SFA--OIIY REPORT BY MR. j HA-tEE. £ SERIOUS DAMAGE -ROM RUST.

The Engineer to the Harbour Board, - njrHamer, submitted the reports to the Committee afc the meeting held yesterday Xraoon, with regard to the coition ft the railway wharf and the matter of the fenders. report was as fol- < naTe y inspected the Railway Wharf, and * \ that rnst marks show «v certain piles hraces -t and about high water level. an whpre they occur in piles, it is mostly at ■ .hf junction of the built up top with the jiile proper, and it arises from the ferruU. jd -wrater from the concrete Itself has in so ?e cfsesVoUected in the ferrule In mlnute ?nH-i«T and this has acted within the 2ndi ofthe two bars joined by the ferrule Otier minor marks arise from embedded ■Sail' ironstones ends of lacing wire, the nroDJs of'distance pieces, protruding: over X baS, or stones between the concrete surface and a bar, permitting damp to S*el to the steel work. On the braces the. m°rks in some cases arise from the near- " BW ofbars to the surface, and from the * !l S S e due 0 " c o d the bo mmcultr of the situation of ramming concrete in a diagonal ■ framework, which is immediately washed bf the tides, before there is any setting To overcome this, we ourselves moulded braces beforehand, and Used them in place. The repairs carried out by the contractors W Oife or more plasterers have been engaged on the work since the first part was stripped of falsework. As the areas completed outdistanced the plasterers pointing the roucher-lDoklng surfaces and edges fractured in stripping, I wrote to the contract- ■ orS to put on more plasterers. The exposed surface of concrete from the underside of the Hallway Wharf deck to low water level is 14i acres, and, as I hare previously stated verbally and in writing, it is not possible to carry out any such area without some defects becoming apparent, nor have I fouud anything different in the many cases I have piamlned In Europe and America. I recommend that such places as it is deemed neees«iv be cut out and pointed. The stability ot the structure Is not affected in any The engineer also supplied a report regarding the substitution, of 16 by 16 totara fenders for fender piles at the Haflway wharf. Mr. A. J- Entrican thought it would be well if the Engineer could give a .definite assurance at the end of his report that what damage there was need cause little apprehension. air. Hamer: "It is practically nothing. 1 will give it to you if you like. In making repairs it is necessary that the I plasterer should clean the steel from just all round, and not merely in front." ; The Chairman remarked that there was not so much rust showing on their own constructions in- ferro-concrete. Mr. A. Keyes said that might be due to • the experience gained and more careful supervision in consequence. He knew that on Queen-street wharf and their own constructed works there was not nearly so much rust showing. Mr. Hamer said there would be no work, irtether done by the Board or by contract; that would not show some . defect when the works >were of such an ■ extensive nature. Mr. Keyes: "Still there is not much Tost showing in Queen-street wharf." 3lr. Hamer: "Give it time. It may be flereloping and 'has not yet come to the surface." /■The Chairman said that Mr. Hamer's report on the fenders disposed of one point raised by Mr. Bradney. 'Mr. Hamer said he personally delivered (he drawing and the letter to the contractor, and yet it had been stated that no letter had been given. The original Echeme cost £572 10/-, and the amended work £458 7/-, but there were additional concrete works which would account for the difference. ilr. W. J. Napier: "That disposes of one bogy. The most unfortunate statements are being made by some of the candidates "with regard to the Railway wharf. One is that the blue metal that is being put under the wharf to repair where the tide deflector was damaged is Ibeing lifted again by the Board's dredgers. Have your dredgers raised any of that stone?" Sir. Hamer: "No; nor has any dredgei jsrorked near there for months." 5 The reports were then adopted.

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FERRO-CONCRETE WHARVES. Auckland Star, Volume XL, Issue 74, 27 March 1909

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