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Pocketbook of Useful Formulæ and Memoranda
for Civil and Mechanical Engineers

Forfatter: Guilford L. Molesworth

Sider: 744

UDK: 600 (093)

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477 OF ENGINEEBING FORMULÆ. Staying Locomotive Boilees. FIKE-BOX WATER SPACES. Working pressure in lbs. per square inch being ith. of bursting pressure; stays, f in. diameter; copper plates, J in. thick; iron ditto, | in. thick. Stay. Plate. Stays 5 inches apart. Stays 4 inches apart. Copper Copper (Screwed and) ( riveted J 107 185 Iron .. Copper (Screwed and'i 1 riveted J ICO 250 Iron .. Copper Screwed only 120 190 Iron .. Iron .. (Screwed and'i ( riveted J 185 290 For low-pressure boilers, at 20 lbs. per sq. in., flat portions should be stayed at intervals of 12 in. apart. FOB TOP STAYS FOR LOCOMOTIVE FIRE-BOXES. S = Span of stay in inches. B = Breadth of ditto in inches. D = Depth of ditto in inches. L = Working load in tons. T 24.BD2 L = —B------- Strength of Rivets. Shearing strength of a Lowmoor rivet in tons = 18 cl2 when d = diameter in inches. Mean tensile strain of rivet-iron in tons per square inch = 26 • 3 Fairbairn. 25-98 Kirkaldy.
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