Transactions of the International Engineering Congress, 1915 ...1916 |
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Palavras e frases frequentes
action aggregate alloy aluminium amount average beams brass brick bridges Brinell bronze building cantilever bridges carbon steel cast cent chemical City Eng clay coat construction copper corrosion cost cracks Creosote cubic decay density diameter Douglas fir elastic limit electric Engineering feet Forest Service Frémont girders grade hemlock Impact Tests important increase Iron and Steel length load Longleaf machine manufacture material Mayarí Mayarí steel metal method mixed mixture modulus moisture mortar nickel steel Notched Bars obtained paint paper percent piles pipe plates Portland cement pozzolana practice Proc production proportions protection railroad Railway reinforced concrete removed H resistance rivets rust sand sea water southern span specific gravity specimens spruce square inch stresses structures surface temperature tensile strength teredo timber tion tons United voids water-tight waterproofing weight western hemlock wire wood yellow pine zinc Zinc Chloride
Passagens conhecidas
Página 38 - In cases where timbers do not contain the pith, and it is impossible to locate it with any degree of accuracy, the same inspection shall be made over 3 inches on an approximate radial line beginning at the edge nearest the pith in timbers over 3...
Página 39 - The aggregate diameter of all knots within the center half of the length of any face shall not exceed the width of that face. NOTE. — The diameter of a knot on the narrow or horizontal face...
Página 38 - ... all as measured over the third, fourth, and fifth inches on a radial line from the pith. Wide-ringed material excluded by this rule will be acceptable, provided that the amount of summer wood as above measured shall be at least one-half.
Página 216 - Mortars composed of one part Portland cement and three parts fine aggregate by weight when made into briquettes shall show a tensile strength of at least 70 per cent, of the strength of 1 :3 mortar of the same consistency made with the same cement and standard Ottawa sand.
Página 483 - Ibs.. while the requirement was only 50,000 Ibs. It is possible that experience in the production of the alloy will result in greater regularity and less cost. If such proves to be the case, Mayari steel is likely to supplant entirely the other alloy bridge steels at present obtainable; but it is far from being the ideal alloy for longspan bridge construction. Even if the inherent irregularity be made truly non-injurious to the metal by always keeping its characteristics well above the specified...
Página 216 - If the aggregate be of poorer quality the proportion of cement should be increased in the mortar to secure the desired strength.
Página 37 - Shall show not less than 90 per cent heart on each side and edge, measured across the surface anywhere in the length of the piece. Shall be out of wind and free from shakes, splits, or pitch pockets over three-eighths inch wide or 5 inches long.
Página 39 - Checks and splits shall be limited as provided for shakes. No checks or combinations of checks with shakes which would reduce the strength to a greater extent than the allowable shake shall be permitted.
Página 313 - Tests of the absorptive and permeable Properties of Portland Cement Mortars and Concretes, together with Tests of damp-proofing and water-proofing Compounds and Materials ; by RUDOLPH J.