. Tests of railroad tie plates . ntering the ties. It appears that with new ties of ratherhard wood the claw plate exerts the most influence in preventingspreading of the track under heavy lateral loads. Under lightlateral loads, however, there is little difference between theperformances of the different types. The flange plate appearsto offer the most resistance to indenting the tie and tobuckling. The flat plate is useful in holding the rail to gagein that it makes all the spikes exert a resisting force againstspreading the rail. This force, however, is less for flatthan for either claw or
. Tests of railroad tie plates . ntering the ties. It appears that with new ties of ratherhard wood the claw plate exerts the most influence in preventingspreading of the track under heavy lateral loads. Under lightlateral loads, however, there is little difference between theperformances of the different types. The flange plate appearsto offer the most resistance to indenting the tie and tobuckling. The flat plate is useful in holding the rail to gagein that it makes all the spikes exert a resisting force againstspreading the rail. This force, however, is less for flatthan for either claw or flange plates. Flat plates have noadhesion to the tie, while longitudinal flange plates have lessthan claw plates. No attempt has been made to determine the effect ofweather or traffic on the different types of plates. Thisappears to be a very important line of testing. This andother tests will undoubtedly be carried on in the future bythe Engineering Experiment Station of the University ofIllinois. Cross Head of Testing Machine. Weighing Table ofTesting Machine Figure of Apparatus forTest of Resistance to Buckling and Embedmenttestsofrailroadt00rega
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