Hello there, I'm in the process of detailing a concrete pier shaft for a bridge.
I thought I had it detailed correctly until when I went to measure the angle of the shaft.
Angle should be 0.95 degrees a 1 to 60 slope. In the top view I used the cut profile tool at a draft angle of 0.95 degrees to cut the length of the shaft.
But when I measure it's indicating an angle of 1.34 degrees. I must be doing something wrong but don't know what. Can someone help?
Pier Shaft
Cut profile in top view
I'm using V8i SS2 V.8.11.07.443
The draft angle is 0.95 and is correct. The face of the wall is at 0.95 degrees. You are measuring the angle at the intersection of 2 sloping walls which results in a steeper angle along the edge.
See green lines in attached file.
I see what you're saying from your green lines.
What I want is the centreline peak of the pier shaft to be 0.95 degrees for the full height of the pier.
Maybe I'm not using the right tool to get what I want?
Nicole Joyal
Bridges & Highway Structures
Manitoba Infrastructure
Canada
You just need to recalculate and modify the draft angle. -0.6752 should do it. That is based on your orginal 60:1 slope not 0.95
How did you calculate that answer? I came up with the same by just inputting lower values until it looked and measured correctly.
Actually rather than go thru the math I solved it graphically. I just drew a line at the slope you wanted starting at the base and extended it to the top of the pier. From there I drew from the top point at 45º (in top view) extended to my previous green line. Then modified that the green line to the new slope and measured the angle.