How to construct the upslope and downslope bridge?

(1) Construct the UpslopeBridge

Adjust the height of middle support leg and rear bracket to suit the bridge slope after assembling the launching girder. Before the launching girder moves longitudinally, lower the rear support leg and rise the rear bracket to ensure the slope of main girder <0.5%, and hang winch at front part of launching girder to protect it from sliding down as moving. After the front leg moves to its position, adjust the height of front support leg according to that of middle support leg, level the launching girder, then begin installing girders.

(2) Construct the Downslope Bridge

It is same to construct the down-slope bridge as the up-slope bridge. Before the launching girder moves longitudinally, make the middle support leg rise and lower the rear bracket to ensure the gradient of main girder <0.5%, a winch must be hanged at rear part of launching girder to protect it from sliding down in the moving.

Adjust the height of front support leg after it moves to proper position, if it has a large slope, add short sleeve and necessary coupling support between inner sleeve and connecting cross-beam, level the launching girder, and then begin installing girders