Why does everyone jump straight to this issue being due to negligence from the PEMB? We work from Contract Documents and follow the Code just like any other SE group, so why should I be labeled as a bad engineer. There is a lot of good information shared here, but there is also a lot of witch...
There is a little test data out there that shows a "friction diaphragm" that will occur between the purlin and roof panel when insulation is compressed. I would not rely on this, but I could probably drag out some documentation if you need it. The other consideration would be actual loading...
I agree completely with a2mfk. The problem is that owners and contractors are not willing to absorb the expense associated with coordination. I have 15 years design experience with multiple PEMB companies and have now moved to the sales side. It is appalling the lack of knowledge some of the...
I will agree with Hokie, that it appears to be preperation for a lawsuit after the deepest pocket that can be found. I will also agree with Jed that it appears that they were approaching the site from more of a shoring and remedial stanpoint than an investigation standpoint.
My question is...
Am I thinking wrong, or does ACI 318-05 not require the use of factored service loads. The maximum reaction should be used for a check only. I agree with JAE, send him a fee letter stating what it will cost him for you to do his job.
I am a PEMB Engineer, and I am suprised that everything is not failing for the current Code. Just losing the 1/3 stress increase for transient loads should be causing significant problems. In 74 the building was most likely designed as 12/20/20 (12 psf frame load, 20 psf roof secondary load...
I am suprised that it hasn't been questioned if the building was actually designed. It is common practice in rural areas for buildings of this nature to just be built, with no design consideration. The exception would be if the Fire Department received matching funds from the state or federal...
It looks like ASCE is following New Zeland and Austalia on the wind. Corner, edge, and endzones are nothing to them. They have about 10 different zones on the roof surface for variable wind load.
As an engineer with a PEMB company, I would reccomedn that you go back to the original manufacturer and have them do the analysis. Are they going to charge for the analysis of the strucutre and the specification of the re-enforcment? You better believe it, just like every SE on here that has...
Roof huggers or retro zees over the existing roof panel is actually a fairly common practice now. The major issue with the added load is having to bring the structure up to the current code. With that you lose the 1/3 stress increase for transient loads in the older buildings which typically...
Unless it is in SDC D or there are dynamic loads such as cranes, I would expect either snug tight or turn of the nut method for bolt tightening. Calibrated wrench is a touchy subject, because most PEMB connections do not require washers and the bolt/endplate configurations do not work out for...
One of the boys in the Ivory Tower. The Delta Joist is and was a slick system, but I believe they have stopped offering it. Panelizing the roof on the ground significantly sped erection and lowered cost in the field.
