We are designing a bridge and the client has requested that all vertical concrete surfaces be coated to prevent graffiti. We have not specified this before, but from looking on the internet, I see there are sacrificial and permanent coatings available.
Anyone have any experience with either...
I have a general question about the width of a concrete bridge deck. In the past, for a steel beam or plate girder bridge supported on steel rockers and bearings, longitudinal joints were used in the deck was to reduce the transverse movement at the bearings due to expansion and contraction...
For H-piles bearing on bedrock, is there a minimum length which should be provided between the bottom of footing and top of rock, other than for cost considerations? The overburden for this particular project is mostly clay material.
I am reviewing revised shop drawings for a bridge and the fabricator has changed a weld detail. I am curious as to why he has changed the detail.
The original plans called for a complete penetration groove weld between the stiffener and the flange. The first submission on the shop drawings...
We are designing a drilled shaft soldier pile wall, socketed into bedrock, to restrain a land slide area. Our geotech consultant has run the lateral load analysis and given us the maximum shear and moment on the drilled shaft.
We have designed the shaft for the maximum moment, reinforcing the...
I don't like my cursor to move when I hit the "enter" key, so I typically have that feature disbled in Excel. However, when I protect a worksheet or workbook, then the cursor automatically moves when I use the "enter" key.
Is there any way to prevent this?
Thanks
We are preparing plans for a project which requires a 3 million gallon flow equalization tank. We have been looking at information on wire-wound and tendon prestressed concrete tanks. Each seem to have advantages and disadvantages. I would like to know from others who have experience with...
We are preparing rehab plans for a concrete frame viaduct. At the expansion joints in the deck, double-column piers were used to allow for the thermal movement. The clearance between the faces of the double-columns is only 8". Of course, this is also where the majority of the...
I am looking for advice on a weld repair. The fabricator is fabricating a fracture critical steel girder with butt welds in the flanges. During the inspection of one of the bottom flange butt welds, a slag inclusion was found. The fabricator proposed a repair to remove the slag inclusion and...
I am looking for advice on a weld repair. The fabricator is fabricating a fracture critical steel girder with butt welds in the flanges. During the inspection of one of the bottom flange butt welds, a slag inclusion was found. The fabricator proposed a repair to remove the slag inclusion and...
I have two questions. Is the empirical method applicable to concrete decks supported on spread box beams?
Also, under AASHTO LRFD 9.7.2.4, it states the effective length to design depth must be between 6 and 18. What is the basis for the lower limit? If my ratio is close, say 5.46, can the...
