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abutment added added to Eq affected amount angles apply bears becomes belongs braces Bridge centre changed Cloth compression consequently considered constant load counterbraces depth determined distance divided double truss edition end panel Engineer equal equation example extends feet figure following table form the following full load given gives greater greatest half Hence horizontal chord horizontal strain Illustrated inclined braces length less lower chord maximum measured ment moving load multiplied number of panels obtain opposite panel end panel load panel points passing pillar points of Simple practical proportion rafter reaction represent segment shown Simple Truss sion Strains in Tons struts Substituting the values tension tion uniform unloaded abutment upper chord vertical component vertical strain weight whence
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