By varying eccentricity input to the pylon legs left and right,

on top and at bottom, one can get varying shapes of the

pylon.

Streamlined deck box cross section

Figure: Revit 2D Profile family cross section to be customized in Revit Civil Structures 3D Deck

The cross section is designed by the top lines and the bottom lines. The top lines are numbered from 1, 2, 3... to

the left and to the right side of STLo, called topL line and topR line. The first topL line is given by a horizontal

distance (HDis), a slope or a vertical distance (VDis) from STLo. The next is based on the previous, and so on,

as shown in input below.

The bottom lines are counted 1, 2, 3... from left to right. The first bottom line is given by HDis and VDis from the

end of topL line. The last bottom line is given by HDis and VDis from the end of topR line.

Example above shows a cross section with 5 top left lines, 5 top right lines and 9 bottom lines. By changes of

ICDAS input, one can run Add-Ins in Revit to update geometry model and LusasCSB.cmd file for the analytical

model. 

Input the inclining bottom point B1, B2 & B3

The bottom points B1, B2 and B3 are designed  for the vertical plates in Lusas. 

Using expressions for the bottom points one

can easy increase or decrease the depth of the

box to optimize its stiffness.

The vertical distances b1, b2, b3 are calculated

for knowing a1, a2, a3 and c. The distances

(a1, b1), (a2, b2) and (a3, b3) are then entered

as input for points B1, B2 and B3 in Excel BRIDGE

sheet (or input text file INPUT BRIDGE.c )

Optionally, the vertical input distances b1, b2 and b3

can be measured in Revit. In profile shown above drag

the bottom line of point 3-7 down to a new depth of

deck box. Then drag a horizontal line through the end

top line 5, then drag three vertical lines through the

bottom points 1, 2 and 3 which intersect the just created horizontal line. The user can now measure the three vertical distances b1, b2 and b3 to enter in input for the next addin run.

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