I have a 12" thick concrete wall about 20ft in height spanning between two existing concrete slabs. The wall must support the slab above which will have a large opening cut in it for a new stairway. Taken into account shrinkage in the wall, should the contractor allow for grouting the top of the...
Thanks to everyone for your input. We are taking a closer look at this defect and gathering additional information. For those interested, I will report back on our findings. And again, thanks for the input; it was very helpful.
bridgebuster, here is an additional photo
By the way, thanks to everyone for their input.http://files.engineering.com/getfile.aspx?folder=e5c23603-cded-4b7e-9682-63548d5dbb0f&file=DSCN1149[1].JPG...
Added a photo of the crack. I think having the fabricator respond may shed some light on the cause.http://files.engineering.com/getfile.aspx?folder=695f74e3-83d4-4354-94d9-1da364d2dbd4&file=DSCN1147[1].JPG
A new W36x330 bridge beam arrived from the fabricator with a longitudinal crack in the web at the neutral axis. The crack is about 4ft long starting from one end of the beam. Visually, the width of the crack at the surface is maybe 1/16", the depth of the crack is small, about 1/32". Thought...
I'm looking for any information on a Weyco aluminum glulam deck clip. This is a z-shaped clip used to connect glulam decks to glulam stringers. I'm looking for any strength, tests, papers on the use of this clip, in particular, on Southern Pine.
Looking for any suggestions on developing a load rating for a concrete pile with axial and bending loads. Since capacity is a function of the live load, the standard AASHTO formula is not readily applicable.
Any references or suggestions would be helpful.
Cooper, the construction is just as you described. Longitudinal steel thru plate girder with transverse steel floorbeams and concrete arches between each floorbeam. The connection of the floorbeams to the girders seem to be a custom designed moment connection near the bottom flange of the plate...
I am analyzing an existing steel thru girder bridge with concrete jack arches between the steel floorbeams. I'm looking for a reference. Can anyone help?
I have a case where double angles are used as compression members (braces). However, they are picking up some wind loads causing bending about the y-axis. AISC doesn't specifically address this situation if Chapter "F". Any suggestions
According to AASHTO 3.10.9.2 and 4.7.4.3 it seems that if a bridge is in seismic zone 1, no seismic analysis is required except for a connection load at the bearings and a minimum bearing length requirement. Does this mean that the piers and abutments do not have to be checked for any seismic...
CSD72,
Thanks for the quick response. It seems to me that it would be a rather complex problem with wind loads in many directions, dead loads, moments, etc. There are a lot of these out there. I haven't heard of any comming down. As engineers do we just take the supplier's word that they...
Many antennas are now straped to poles, chimneys and other structures. Friction seems to be the major supporting force. How are these mounts analyzed to take into account friction? Finite element analysis,conservative assumptions, etc?
For a gravity wingwall, Bridge manual states max spacing of construction and expansion joints.
When and where on the wingwall should you place an expansion joint? (near corner, at stepped ftg, etc)
I'm looking for a good book on bridge design. I'm an experienced building engineer that is looking for a good book that fills in the number crunching info available from AASHTO, etc. (What, When, Why, How, ...)
