Has anyone ever nested a channel against a web on a wide flange beam to strengthen it? I have a project with limited access in which an existing W (top flange loaded) needs to be strengthened, but not by much. The plan is to take a 12" channel and weld it to the center of the web as to provide...
I am working with a contractor on a project which an unreinforced masonry structure was stabilized (sink hole). As always, the walls cracked. My plan is to provide reinforcing details for the significantly cracked areas but I am being asked to provide repairs for the minor "hair line" cracks...
Has anyone ever spliced two HSS sections with a cap plate, when the top column is less then dimension of the interior of the bottom? I have a column which is being repaired and the contractor wants to use an 8" square section under an existing 6" round using a 1" plate in between. I have never...
I am looking into designing a very small single family residence with clay masonry. The builder is wanting to use 4" brick. Right now I am just brain storming the problems that may come up and would like to have others input as well. So far one of the biggest things that is jumping out at me...
Gentleman,
What would be the minimum depth for the footing of a wall? Could it be 8"? Footing is directly cast againist earth. I am looking at ACI318 req. of 6" of cover ABOVE reinforcing. So if I use a #5 bar, with the req. 3" of cover on the bottom and 6" on the top, I find 8" impossible...
Does anyone know if it is possible to see the fibers in fiber reinforced concrete via a cut cross section of the slab? Assuming small stealth type fibers commonly used in residential construction.
Good afternoon gentleman,
I have designed a cantilevered masonry wall which will reach 6'-0" above grade. It is in Florida with a wind speed of 120 mph. The vertical reinforcing calculations are indicating that I need #5 bar at 24" o.c. The builder has built this wall in the past using a...
It's been awhile since I have designed cylindrical footings, such as those formed from sono tubes and filled with RC. I have a 12' light pole and am coming up with a 16"diax36"d footing sized for overturning. This seems a tad large too me....any comments?
Has anyone ever designed an angled masonry wall? Like a pyramid, but not sloping to a point just a slight angle. The architect is calling to stack the blocks in slightly each course, about an inch or so, and then to provide a continuous tie at the top with RC. Initially, I don't se a problem...
I am looking for some info regarding concrete boat ramps and how the erosion at the bottom is handled. One of my friend's HOA is considering putting one in and was asking questions about how to treat the edge and how far in the water it should go. I would assume a gravel base near the end a...
I am seeing more and more architects signing and sealing structural drawings for townhomes, clubhouses and single family homes. Am I mistaken in thinking that they are not supposed to be doing this?
There is an influence factor to determine the stress below a corner of a rectangular area which is derived from Boussinesq's equation. The format is a large equation of m and n, then an arctan. There is a modifier for when the arctan portion of this equation is negative. Does anyone know what...
I am faced with a situation where non-approved hollow metal frames were used in a building. The frames are of sufficient strength to meet to required wind loads. Can I provide calculations justifying this for the project and be in compliance with the code? When I read the code, it seems that...
Has anyone used the Contec PS floor joist system? I am designing a home with this product and can not seem to find much information regarding connections and details.
Thanks!
I am trying to get a grip on soil properties. I have seen many tables listing typical phi, gamma and E values for different soil types. However I have not seen one for Cu. Does such a table exist? Does anyone have a link?
Thanks!
SS
I am in desperate need of a variety of N-value and qc correlations for SPT and CPT tests. I am looking to determine values such as Cu, OCR, Dr and Phi. Please help!
Can anyone verify if the provisions for lap splices is the same in ACI 530 as it is in ACI 318? I have the current 530 and have seen that they changed from 2002. Have they also changed in 318 from 2002 to 2005?
Thanks in advance!
What is the purpose of horizontal reinforcement in a short retaining wall, say 5'-0" high? I have seen it detailed but fail to understand what force would create the need for that type of reinforcement in the wall.
