John QPE
Straight Outta Compton
- Joined
- Oct 29, 2012
- Messages
- 1,055
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Need some help on this one guys, I'm drawing a blank:
A 520 ft long equal tangent crest vertical curve connects tangents that intersect at station 340+00 and elevation 1325 ft. G1 is +4.0% and G2 is -2.5%
Determine the elevation and station of High Point, PVC, and PVT
So I have:
PVI = 340+00; Elev 1325
PVC = 337+40; Elev 1314.60
PVT = 342+60; Elev 1318.50
HP Station I am getting (PVC + 320 ft) = Station 340+60
For HP Elevation I am getting 1327.34 which does not agree with the solution.
I'm using:
y=ax^2 + bx + c
A 520 ft long equal tangent crest vertical curve connects tangents that intersect at station 340+00 and elevation 1325 ft. G1 is +4.0% and G2 is -2.5%
Determine the elevation and station of High Point, PVC, and PVT
So I have:
PVI = 340+00; Elev 1325
PVC = 337+40; Elev 1314.60
PVT = 342+60; Elev 1318.50
HP Station I am getting (PVC + 320 ft) = Station 340+60
For HP Elevation I am getting 1327.34 which does not agree with the solution.
I'm using:
y=ax^2 + bx + c