Let's say we have a residential building comprised of a parking garage with a steel bar joist system above. The joists had significant surface rust however no reported penetration/deterioration into the cross section of the members.
Without any further preperation (i.e. sand-blasting, priming)...
Stay with me here...
The IBC (specifically NY State BC) states under Chapter 17, Special Inspections (1704.3.1) "The basis for welding inspector qualificaion shall be AWS D1.1"
I don't have AWS D1.1 but I found an article stating that Qualification and Certification of inspectors are two...
So I'm at a meeting the other day when the client tells me I need to spec out a "break away bolt" at the firewall bracing connection. First, is there a such thing as a break away bolt and if so, how does it work. The detail is as follows.
An 8" cmu firewall fits in between a unit separation...
Anyone know if a remote control 3-way light switch exists? I want to put a remote control switch on a brick wall and I don't want to screw around with running wire to it. I've seen a two-way remote control switch that runs on AAA batteries. Maybe if there is no 3-way remote control switch, is...
I'm presenting engineering to the 4th graders in my son's cub scouts tonight. I had planned on discussing a little bit about what a structural engineer does. I'm also going to bring in a transit and do some surveying. I would like to have them do some kind of project also. When I was in 7th...
I have existing epoxy anchor bolts embedded in a slab with a dbl wood bearing plate on it. Can anyone recommend or point me in the right direction for a proof load testing procedure for these bolts?
Thanks,
Drew
Two part question.
First, Is there a relatively easy way of stopping corrosion on a metal truss plate? I have wood roof trusses in a building on the beach and the salt air has begun corroding the metal plates within just a few years. I could attach plywood gussets over the plates but this...
Simpson used to make proof load indicators though they have stopped for one reason or another. Does anyone know of another manufacturer who makes these?
Drew
When performing a perforated shear wall calculation, a factor (F) is determined. Now if I have more than one wall in line with each other is it proper to multiply this factor times the length of the perforated wall (giving me an effective length of just one of the multiple walls), then adding...
Exposure Category D is defined as "Flat, Unobstructed wind flowing over open water..." I have a situation where the site is up on a hill but does have an unobstructed path to over a mile of open water.
I'm tempted to use 'D' however I'm thinking that perhaps the effect caused by...
So I'm doing what I normally do on Saturday night, when I come to Section 6.5.6 of ASCE 7-98 (Exposure Categories). It seems that Exposure D is described as Flat, unobstructed areas exposed to wind flowing over open water. Well one site that I have in mind is just that, however it sits up on a...
I'm searching for a site that would have topo maps online for FREE! I've found a s*&t load of sites where you can buy them but I've got to believe some topo nerd has indexed the entire topography of the U.S. one lonely Friday night.
If you know of such a site, or are the lonely topo nerd...
I have a temporary structure (5 years), that will be sitting on poor soil (about 4' of decent fill on silty clay with a very low blow count). The thought is to build an adjustable floor over the foudation where periodically, an adjustment can be made to keep the building level as settlement...
A steel column was installed out of plumb (1-1/2" in 8'-6"). I know this is out of the L/500 allowable. Does anyone see a problem with analyzing the column as is (in other words checking the increased load due to the angle, shear through the connections at the top and bottom of the...
I have always used inflection points for determining unbraced lengths at negative moment locations on a beam. I was just informed that this is not okay. Can anyone either lead me to a code or standard that discusses this?
Thanks in advance,
Drew
I'm interested in modeling software primarily for wood framed structures (residential, multi-family). Does anyone have any recommendations? Please include a website if available.
Thanks,
Drew
With shallow roof pitches, windload on both the leeward and windward sides create an uplift. Logically, this is hard for me to see. How can wind hitting a surface actually lift it up?
I reason it as such... (correct me if I'm wrong)
It's similar to an airplane wing. The air traveling over...
Can anyone school me on a non-destructive test to determine compressive strength of an existing round columns (test cylinders, of coarse, have been disposed of)?
