I was just spitballing numbers and got the initial result with Cs greater than 1, I have to start digging into things and refining my numbers, but I wanted a gut check from other engineers to make sure I wasn't heading down a ridiculous path.
Working on project in a very high seismic area, Ss = 1.863 and S1 = 0.866. When I run the ASCE equations, I get a Cs greater than 1, is this something that happens? I am just surprised that the acceleration is greater than "g". So just wondering if this is a real phenomena.
If I'm right in your thinking, by unconfined you mean unconfined reinforcing (no ties). Looking at it that way would be checking as if it were plain concrete. One thing to check is if the emperical formulas apply, if I remember correctly there is an axial stress limit.
As a florida engineer remember hearing about the possibility of having the SE become a new credential at somepoint, but it didn't make it through the legislature. And now with this condo collaspe bringing so much attention to engineering, was wondering how this will impact the practice in the...
I have to agree with TheGreenLama, most homeowners are going to bulk when they are told they have to come up with 100k to do repairs. It is just not easy for folks to do. I lived in a south Florida community for several years that had HOA dues, and part of the dues went to pay for water to the...
I would imangine that this is because bridges are public and buildings are private. Housing payments are already high and to require building owners in this case an assoication of owners to pay for inspections ever year or two would be difficult. It appears that people in the building have...
Saw a article from CNN written by an architect
Link
Surprised that he would comment on structural aspects of the building. Should engineers be speaking up?
I used the NCSEA course that hemiv mentioned. It was the least expensive that I remember, but all the courses were recored. I do remember that the instructors would answer questions promptly. During the exam, the concrete notes that were provided from the course were extremely helpful. They...
No architect on the project, using the special industrial exemption for the building. There are four full floors, and about 2/3rds is concrete deck and the balance has steel grating. In the grated area, there are three vessels that run vertically almost the full height of the building. The...
Are you reaction vectors pointing up at the bottom and down at the top (for the vertical direction)? If you have pinned both the top and bottom, you probably will get tension at the top and compression at the bottom. You need to release the gravity degree of freedom at the top and your stairs...
Working on a project that has four stories and part of the flooring area is steel grating and the balance of the area is concrete slab. The grated floor area contains vertical vessels that go pretty much the full height of the building. The client wants the grating around these vessels.
The...
Working on a project that is supporting some equipment on railroad ties, and I am having trouble with finding properties on them. I noticed at a few places that a modulus of rupture is specified, and not an allowable bending stress like I am used to. Would that MOR be used in lieu of allowable...
Reviewing some drawings and the detail specifically calls out 7/8" diameter holes to be used with 3/4" bolts. Since the bolt holes are not standard and is not oversized, would it have to be slip-critical? Or is it not even allowed per the code?
It would have to be slip-critical. AISC J3.2 states that oversized holes cannot be used in bearing-type connections. So any connection that has a ply with oversized holes needs to be slip-critical.
Not sure how big the inner pipe is, but a 12" pipe has an I=262 in^4 and for example if the inner pipe is 4" its I=6.82 in^4. If it is a composite section it is not really much bang for your buck. The two pipes are concentric, so the combined I is just the sum of the two individual I's.
I...
I usually go with the top plate, since most of the guides and examples I have seen follow this assumption. I assume that the rim joist acts as blocking for the floor joists if the load is small (sometimes I will block the floor joists at the top plate and consider the blocking as a strut that...
My firm is looking into doing some work in Canada (not sure which province) and I was asked to look into the engineer practice requirements in Canada. My firm is located in the US and I have never done any work before in Canada, so I have not much of an idea of where to start looking.
If any...
ASCE 7 says to treat fascia panels like an inverted parapet for an open structure if the slope is less than 5 deg. Is there a rule on how you would treat fascia panels if the roof slope was 10 deg?
Poster I once saw on a bar bathroom wall, liked so took a picture. Alot of truth to ithttps://files.engineering.com/getfile.aspx?folder=4fe1f5a1-f4b7-425c-819f-4d6f621d6b24&file=Murphy's_Law.jpg
