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| Keywords: Forth Bridge - General view taken from Dalmeny Park at water level.jpg of same it will be seen that the distance from centre of vertical column to the point on the bottom member at which the first tie strikes it is 180 feet in a horizontal line Though owing to their dimensions and general design these 12 feet tubes were able to support themselves with facility it was considered expedient to limit the unsupported length not only on account of its own weight and the cage it carried but because such provision would forward subsequent operations The most satisfactory plan that could be adopted for this purpose was to bring into use some of the permanent work already fixed and with this end in view the method employed was as follows - At a point in the vertical columns some few feet above rail level were bolted plates to which was attached a chain comprised of links which had once played a leading part in the construction of old Hammersmith Bridge stretching to the extreme end of bottom member and screwed up tight This chain however was not as commonly supposed intended to take any considerable strain but merely to prevent any sag in the tie subsequently constructed Accurately speaking therefore it was a temporary tie to support a permanent one during construction that actually devised to take the weight off the tube being composed of a portion of top member for Bay 3 Transcription from Philip Phillips 'The Forth Railway Bridge' Edinburgh 1890 Size cm 43 58 exhibition history Institution National Library of Scotland photograph object history PD-old-70-1923 Creator Philip Phillips RB l 229 74570358 Forth Bridge - General view taken from Dalmeny Park at water level Uploaded with GWToolset Forth Bridge - General view taken from Dalmeny Park at water level http //deriv nls uk/56YK98Q/7443/74438678 2 jpg Construction of the Forth Bridge Images uploaded as part of NLS-WMUK collaboration | ||||
