Instructions on
Instructions on Modern American Bridge Building
作者：Tower, G. B. N. (George Bates Nichols), 1834-1889
体例：题 章数：46
字数：50,587 来源：Project Gutenberg
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cache/epub/14873/pg14873.txt（Project Gutenberg）
章节目录
共 46 题- INSTRUCTIONS
- ON
- MODERN AMERICAN
- BRIDGE BUILDING.
- WITH
- PRACTICAL APPLICATIONS AND EXAMPLES,
- BY G.B.N. TOWER,
- CIVIL AND MECHANICAL ENGINEER,
- BOSTON:
- A. WILLIAMS & COMPANY,
- 135 WASHINGTON STREET.
- PREFACE.
- TOWER'S
- BRIDGE BUILDING
- Wood, 2000 1000 150
- Wro't Iron, 15000 11000
- Cast Iron, 4500 25000
- PRACTICAL RULES.
- Wrought Iron, a = T/1500
- Cast Iron, a = T/4500
- Wood, a = T/1000
- Wrought Iron, a = T/12000
- Cast Iron, a = T/25000
- Let us apply the formula--
- 10 : 18 :: 8000 : 14400 lbs.
- Now substituting 3 for b, and 5 for d, we have
- A F : D F :: A B : D H
- PRACTICAL RULES AND EXAMPLES IN WOODEN BRIDGE BUILDING.
- The tension on the lower, or compression on the upper chord, will be
- Height : diagonal :: W : W' or
- 12 : 15.8 :: 37500 : 49375 lbs.
- 12 : 15.8 :: 5000 : 6585 lbs.,
- TABLE OF DIMENSIONS OF A PRATT TRUSS.
- PROF. G. L. VOSE.
- TABLE OF DIMENSIONS OF A PRATT'S TRUSS.
- TABLE OF DIMENSIONS FOR SMALL SINGLE TRACK PRATT TRUSSES.
- 13-1/2 3 12 8--3 x12 8--3 x12 2--8 x10 1--7 x10 2--2-1/8 9 x16
- DIMENSIONS OF A MODEL OF AN ARCH BRACE TRUSS.
- G.L. VOSE.
- Now, using the formula
- GENERAL TABLE OF DIMENSIONS FOR ARCH BRACE TRUSS.
- G.L. VOSE.
- TABLE OF CAMBERS FOR BRIDGE TRUSSES.
- TABLE OF AMERICAN WOODS.
- TABLE OF SAFE WORKING LOAD IN LBS., FOR HOLLOW CAST-IRON COLUMNS.
- CORRECTIONS MADE: