A treatise on highway construction . the long armruns a grooved wheel carrying a weight. The distances from thefulcrum in feet and inches are marked on the surface of the clamp for holding the briquette for tensile tests is suspendedfrom the short arm, 18 inches from the fulcrum. Pressure forshearing and compressive stresses is communicated through a looseupright, set under the long arm at any desired distance (generally6 or 13 inches) from the fulcrum. The lower clip for tensilestrains is fastened to the bed-plate. On this plate the cube to becrushed rests between blocks of wood, an
A treatise on highway construction . the long armruns a grooved wheel carrying a weight. The distances from thefulcrum in feet and inches are marked on the surface of the clamp for holding the briquette for tensile tests is suspendedfrom the short arm, 18 inches from the fulcrum. Pressure forshearing and compressive stresses is communicated through a looseupright, set under the long arm at any desired distance (generally6 or 13 inches) from the fulcrum. The lower clip for tensilestrains is fastened to the bed-plate. On this plate the cube to becrushed rests between blocks of wood, and to it is fastened an up-right with a square mortise at the proper height for blocks to besheared. The rail on which the wheel runs is a piece of lightT iron fastened on top of the lever. The pin is iron, and the pin-holes are reinforced by iron washers. The clamps are wood, andare fastened by clevis joints to the lever-arm and bed-plate respec-tively. When great stresses are desired, extra weights are hung on FOUNDATIONS. 405 I ^. Fig. 33. FORM OF BRIQUETTE.
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkjwileysons
