I want to preface by saying geotechnical engineering is not my forte.
I understand conventional design of steel sheet pile walls would utilize active pressure and passive pressure. At certain depth, the two sides would balance out. I would design the wall to that depth (or more to achieve...
The contractor is proposing to replace cast-in-place footings with precast footings during construction. The original design was to have the cast-in-place footings casted on top of a "leveled" mud slab. Our concern is the precast footing would not have uniform bearing with the mud slab. My...
Does anyone have an idea why the below post-tensioning detail was added during construction?
We found the post-tensioning strands broken. However, it has been like this since 2017 and as far as I know not much has changed to the bridge. We are going out to take a look tomorrow.
Potential...
Hi All,
Found a crack on the bottom flange of a steel girder while doing fatigue/NDT inspection. Not entirely sure of the cause of this crack. Any ideas?
Additional Info:
- Bridge was built in 1960s. Girder is a 36WF160. Potentially fabrication defect? The fact there are two cracks almost...
Hi eng-tips,
Just wondering how you would detailed the connection between the hanger rod and support beam.
Some considerations:
- Ease of removal for future replacement.
- Ease of inspection. Whatever the support assembly must be visually inspectable from a distance.
- Durable. The support...
I am designing a steel box girder with lattice walls due to geometric/constructability/maintenance reasons. The box girder is built in 2 "c-channel" sections with connection plates connecting the two halves at the top and bottom flanges at a set (to be determined) spacing. The box girder spans...
Based on the Canadian codes (A23.3 / S6), moment resistance of a concrete beam can be found by determining "c", finding the equivalent rectangular stress block, and obtaining the compression forces in the concrete. This is all fine for a rectangular beam with the same concrete material. However...
