Forth Rail Bridge
the 2.5 km. (1.5 mile) forth railway bridge, the world’s first major steel bridge, with its gigantic girder spans of 521 m. (1710 ft.) ranks as one of the great feats of civilization. it was begun in 1883 and formally completed on 4 march 1890 when hrh edward prince of wales tapped into place a ‘golden’ rivet.
tancred–arrol, constructed the bridge, robustly designed in the aftermath of the tay bridge disaster by civil engineers sir john fowler and benjamin baker. the balanced cantilever principle was adopted. the main crossing comprises tubular struts and lattice-girder ties in three double-cantilevers each connected by 105 m. (345 ft.) ‘suspended’ girder spans resting on the cantilever ends and secured by man-sized pins. the outside double-cantilever sh-r-ward ends carry weights of about 1000 tonnes to counter-balance half the weight of the suspended span and live load.
this concept is readily understood from baker’s ‘human cantilever’ model with his -ssistant kaichi watanabe representing the live load. the pull in his supporters arms indicates the tension in the ties and the push in the lower struts the compression in the tubes.
each of the 110 m. (361 ft.) high double-cantilevers is supported on well-founded granite faced piers. the bridge’s construction involved the employment of 4,000 men at times, the use of 54,000 tonnes of steel and driving 6,500,000 rivets. its total cost was £3,200,000 (~£235,000,000 today).
the forth rail bridge is the best in the world for trains
Read Also:
- inverted dick
when the d-ck rejects the p-ssy. when the p-ssy is so scary the d-ck hauls -ss. not a d-ck at all, but a p-ssy mickey has an inverted d-ck! told u he had a p-ssy.
- Angry Toad
this is a party prank that is best done at a random house party. you start off by emptying a whole role of toilet paper into the toilet and then proceed to drop a huge deuce ontop of the toilet paper (similar to a toad sitting on a lily pad). the best part is if […]
- maxxximum
the sh-t…. one who does everything to the absolute maximum, only thne can they -ssume the nickname of maxxximum. maxxximum craigers is the sh-t, he maximizes all the time!
- maybe next week
same as “maybe some other time.” “maybe some other time” is just a little dated. young, hip women today say “maybe next week.” guy: would you like to join me for coffee some time? girl: uh sure…. maybe next week. guy: oh, i see.
- Aleascia
not a common name you see, but a very sweet girl. for some reason she loves white guys. doesn’t let anyone walk all over her, and people love her booty. she’s also known as an “oreo” “there goes aleascia with another white boy.” “d-mn aleascia you have a fat -ss” 1) “do you know aleascia?” […]