I am re-designing a Pylon sign (30' tall). I say re-designing since the structure has been installed for a while according to my client. No exact date but over 10 years. The reason I am asking is the way I would typically design them is failing the sign.
NBCC 2015 Commentary: Billboards...
Very interesting and this might lead me to start another thread since up in Canada, we never put the pile cap below frost or at least none of the buildings I've seen or been a part of.
Milkshakelake, if you don't mind me asking where are you referring to when you say the pile caps need to adhere to frost depth. This seems a little wild to me since in some cases frost depth is roughly 10'-0". To make a pile cap go to frost depth then it would be impractical to design a piled...
Thank you all for the replies, I am glad that we are all on the same page that this is a snake oil salesman rather than a design consideration that I should have been previously using.
I came across some info from a screw pile manufacturer that was saying one of the benefits of screw piles is you don't increase the frost depth like you do when using a pilaster. See attached photo.
When I design strip footings, isolated footings, pilasters or any foundation system I solely use...
I am looking into a fall arrest anchor design and I could not find any documents speaking to load cases for fall arrest. Lets say under 1.0DL + 1.5 LL + 0.4 WL a roof truss is at 95% utilization. Given the additional 5000lbs arrest load added to the load case the truss would be overstressed and...
Appreciate the comments everyone. Luckily this design is a shear connection only and not even at 50% capacity so lots of gravy.
Interesting comment on the bolt pull-through failure and will have to keep that in mind on future projects when the bolts are in tension.
I guess my question was more so as the EOR is it typical to approve bolt grades not mentioned within the design code. A simple check of shear strength, tension, etc. can easily be done using S16 but S16 was not meant to be used for grade of bolts outside of what is mentioned within the code...
For general work in Canada.
It seems like contractors or certain clients like certain types and grades of bolts that are sometimes different that typical specified.
Currently our client wants to use a Class 8.8 Steel Hex Bolt that meats SAE J1199. The project itself is a platform that would...
Within the load tables for factored axial compression of columns, the tables seem to randomly stop at a certain effective length. Sometimes with smaller (weaker) columns having values at a larger effective length than the stronger column. I am wondering if there is a clause within S16 that has...
Something to bear in mind is intumescent paint foams up when exposed to fire. This foam then acts as insulation to the steel providing the steel with the fire rating required. Generally speaking, the intumescent paint requires the space/ability to expand and without that provides little to no...
We are doing an analysis of an existing wharf structure built in 1913 that utilizing a one-way slab to transfer the load to timber pilecaps and bearing piles.
I am trying to complete a rough analysis for a one-way slab to ensure it can handle the current building code loads (canada). The issue...
Is there a bearing capacity difference between a timber pile with a driving shoe compared to a driven pile with a flat bottom and does the soil matter. Normally driving shoes are used when needing to go through boulders or other material although I have seen them be used by contractors on many...
I've heard that the crane wasn't weatherveined although I've also heard the opposite and the pin was removed allowing the crane to freely spin. Does anybody have any clue on which one may be true?
Thanks all for the replies, I do agree that generally when a post gets the "Get a real engineer" it is mostly because of a generic question with obviously no attempt made (How do you design a skyscraper).
I have a general question in regards to when an engineer should and shouldn't get involved in a project. Common sense, as well as Professional engineering code of ethics, says do not take on a project in which you do not have expertise and experience in. This goes without saying as not a single...
Mullky, something to consider before specifying different bearing capacities for connected sections of your footing. When bearing capacities are normally obtained it is done through allowable settlement, usually 25mm. In your case, the real settlement will be higher in the 2500psf allowable than...
Jayrod,
Very much appreciate the sketch. My only concern here would be bending of the plate although I can easily calculate the bending stress and size it appropriately. Much Thanks
JB
