Road Construction in Turkey

THE introduction of high tensile steels for structural work, in common with all new developments, has created a number of practical problems for the engineer and the metallurgist alike. Among these problems one of the most interesting at this moment is provided by the necessity for obtaining a reliable and efficient riveted joint. William Barr

SIR,-The publication of Mr. Roberts’s paper* read before the Institution last March gives an opportunity for reconsideration. Coming to it with fresh interest one is able to grasp points missed upon the first encounter. One of the most interesting parts to me was the description of tests made on mild steel and Chromador pillars and followed by proposed pillar stresses for the new steel. But Professor Robertson’s pillar formula contains within itself the necessary adjustment for steels of various yields.

0WING to the traffic and to the parapet being in the way, the problem of relating the survey line over a bridge with the line on the road below it cannot usually be solved by setting up a theodolite on the bridge itself. The author has therefore developed the following method and used it successfully at many bridges ranging in span from 40 feet to 100 feet in the course of an extensive survey of electrified railway having a very dense train service. W.P.S. Cockle