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...
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...
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...
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 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...
I have a client that is trying to hang an MUA from an existing 2x10 wood roof joists. Total load is 1000lbs Unf. and will be using a minimum of 18 lag bolts.
I have already calculated the roof joist and they need to be reinforced an additional 2x10 joist at all the connected joists to handle...
I have gone through a few previous posts and thought I would bring up the conversation again and try and get some better references and ideas behind compaction and bearing/settlement. First of all I want to note that each soil condition will result in separate results so lets try and stay as...
I have two similar projects in regards to the depth of foundation and its skin friction resistance, one of them are 12'-0" 12" diameter piles for a storage building and the other is a 5'-0" 12" diameter concrete pile for a deck. For the storage building, I have a soils report and I have to...
All,
A client of mine is asking me to specify the strength of rigid insulation to be used under a slab. In the specification sheet that I got from the supplier, specifies 40, 60, and 100 psi for compressive strengths. I should mention this will be a 6" slab with 10M at 12" c/c and will be...
It seems like in construction and a few buildings that I have been apart of that under partition wall in commercial buildings that a slab thickening is added under the partition walls. In the scenario I am speaking of we are taking over the design from another engineering firm for construction...
I am a junior engineer with multiple more senior engineers in the office who all seem to slightly disagree about inspections and when/if they should be done along with testing. This thread is more an opinion on what and when certain things should be required by the structural engineer of the...
I just found something in the CSA A23.3-04 code that basically sizes a grade beam used for construction as well as needed reinforcement. I've attached the section of the code as well (21.11.3.2).
Basically it says that for a normal grade beam (24"x8") at least in my firm, needs reinforcing ties...
I'm trying to insert a metal deck with concrete topping into my design, although it does not seem to allow me to add a deck without having shear studs within the concrete. For small spans we don't normally use shear studs, is there a quick drop down list that I am missing or should I be looking...
I'm designing a catwalk system that will be installed into a new building. Basically the building was previously designed and I'm trying to calculate the buckling of the column. The height of the building is 29'-0" Tall and the height of the catwalk is 9'-0" Tall. The load from the roof is 71...
I'm a junior engineer looking to get a little clarification on when to be calculating for fatigue failure in Commercial Applications. In school we learned about fatigue in more mechanical situations where we have significant force being cycled quite often but when it comes to building design in...
I'm a junior engineer looking for a little guidance since I am getting some different information for a few people on how to properly calculate capacity of a bell pile.
From my understanding a bell pile's capacity should be derived from solely End Bearing, although from this thread...
I'm a recent grad in civil engineering and confused about how exactly to calculate welding capacities. The issue i'm having is in school we learn to use the handbook of Steel construction cisc. How within this code shear is calculated as Vr=0.67*Θw*Aw*Xu(1+0.5sinθ^1.5)*Mw In this case it can be...
