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Show LONG ROADWAY OF CONCRETE Remarkable Example of Uses of That Material in California Cost Almost $395,000. Under supervision of the California state highway commission there has just been completed the longest concrete con-crete roadway in the world, a remarkable remark-able example of the uses of that material. ma-terial. It is a little more than three miles long, a trestle construction, and cost almost $395,000. The trestle is 20 " feet high and was built in units with a roadway 21 feet wide. It is supported sup-ported on reinforced concrete piles, each weighing from three to five tons, and the floor is made of "pre-cast"' slabs. All the parts were put togeth-. togeth-. er so carepiliy that the completed I structure is practically a monolith. |