Architect and engineer . ite with tight sheetingis useful in preventing subsequent lateraldisplacement in the event of adjacent ex-cavations being made, but it does notincrease the bearing value. If the ma-terial is a pure sand it will not flowunder pressure alone except under ex-cessive loading. In the case of thosesands containing a considerable quantityof clay this may not be true. It is noteasily possible to determine how much,if any, clay is contained in a fine individual grains of sand may andusually are so small as to give the masswhich they form the general appearanceof clay.


Architect and engineer . ite with tight sheetingis useful in preventing subsequent lateraldisplacement in the event of adjacent ex-cavations being made, but it does notincrease the bearing value. If the ma-terial is a pure sand it will not flowunder pressure alone except under ex-cessive loading. In the case of thosesands containing a considerable quantityof clay this may not be true. It is noteasily possible to determine how much,if any, clay is contained in a fine individual grains of sand may andusually are so small as to give the masswhich they form the general appearanceof clay. A microscope may be requiredin such case to determine accuratelywhether the particles are of sand or speaking, fine sands contain-ing a considerable quantity of clay willnot show the characteristic behavior ofquicksand. ?iMNimiiijiliiafi^iTiUg ASH-BASSWOOD-BIRCHAROMATIC RED CEDARCOTTONWOOD-ELM-HOLLYSOUTHERN RED GUMHICKORY-LAUREL-MAPLEOREGON MAPLE-PLAIN OAK- QUARTERED OAK-WYBROCK BENDING OAKPOPLAR--WALNUT. BOXWOOD-EBONY-IRONBARKJENISERO-KOA-SPANISH CEDARLIGNUMVITAE-MAHOGANYROSEWOOD-TEAK-RED BEANSPOTTED GUM-CIRCASSIAN WALNUT LUMBER--TIMBERHARDWOOD FLOORINGWYBRO VENEERED PANELSDOWELS-TREENAILSVENEERS WHITE BROTHERS FIFTH and BRANNAN STREETS SAN FRANCISCO, GAL. THE ARCHITECT AKD ENGINEER 123


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