Greetings
I am working on designing foundations and anchorages for a solar panel array on ground project in Puerto Rico where the solar panel engineer was using ASCE7-16 to develop wind forces on the panels. Note that ASCE7-16 only had a method for development on wind forces for solar panels...
I have been experiencing some challenges with the RISA-Revit link, where the analytical model exports from REVIT to RISA just fine, but the return trip, screws up the analytical nodes, so that some (but not all) of the analytical nodes no longer connect or become misaligned. I am still a bit...
Has anyone experienced all foundation definitions going missing when minor modifications (like moving a node or two) are made to the 3d model? I can understand why those foundation outlines linked to re-positioned nodes might have to be redefined in the foundation module, but why would all...
I was hoping to gather recommendations on the use group for which a metal processing plant (shredding and sorting) would be classified. This facility is able to shred a car in about 30 seconds using a 9000 HP hammermill. MadMax kind of awesome....So cool. Metal does goes flying on the...
I was looking through the 2009 IBC Commentary and stumbled upon a provision that I had to read a few times to interpret and wanted to bring it up with you good folks to ask for your interpretation as well. When looking at page 7-39 of the 2009 IBC commentary (attached), the note in Section...
Our firm has been designing block foundations for combustion gas turbine and steam turbines (either pile supported or on-grade) for a settlement tolerance of 1/4". However most soils reports I see arrive at allowable bearing pressure recommendations based on 1/2" of overall settlement. I'm...
I'm hoping this is the correct forum to ask this question. I'm a structural engineer designing a pile supported foundation for a 10MW Westinghouse Steam Turbine Generator. I was wondering if anyone in this forum knows whether a locked rotor force couple initiated by the generator will also...
Hi all
There has been a debate in the office regarding if it was ever appropriate to show a fillet weld call on a plan without the size. Some engineers "in the day" were taught that displaying a fillet weld symbol without including the weld size used to indicate that a minimum weld should be...
We've been researching provisions in the NY City Building Code relating to structural requirements relative to alteration of existing buildings. Although we have discovered that the NY State Existing Building Code makes allowances to permit existing buildings to undergo limited alterations...
Hi All
We're looking to dismantle and reassemble (from the US to a South American location), an industrial structure built in 1965. I was wondering if anyone here has run across historical seismic design requirements for the eastern US for around that time frame. I assume a pseudo-static...
I was wondering if anyone knew if there would be any reason why shear studs couldn't be installed on steel stringers prior to hot dip galvanization. With proper coating procedures being followed, the pickling or dipping process shouldn't be a concern for material embrittlement, since the base...
I've been taught by mentors long ago, to avoid welding to concrete filled hollow steel sections, especially when the wall of the steel section is thinner than the weld size. The thought is that if you produce enough heat, it will produce a small explosion in the concrete voids, due to expansion...
I've been taught by mentors long ago, to avoid welding to concrete filled hollow steel sections, especially when the wall of the steel section is thinner than the weld size. The thought is that if you produce enough heat, it will produce a small explosion in the concrete voids, due to expansion...
I have been reviewing deck rating calculations for a bridge in New England (USA), when I ran across the rating engineer using all but 3/4" of a 1 1/2" polymer modified concrete bridge deck overlay in the compression zone calculations. I'm looking for someone that might have information...
Hi All
Got a discussion that's been going around the office and I thought it might be good to gain perspective from this group. Here's the long and short of it.
A bascule leaf span must be rated. The discussion revolves around where the critical section is located. Is it at the pin or the...
Could someone help me with understanding how to convert from h:mm (hours:minutes)format in excel to 0.00 hours? I am able to export infomation from accounting software, but the billable hours can only be exported in h:mm format. I would like to extract specific information and total hours in...
I have been having some difficulty applying moving loads to a model (using graphic interface) and then combining the enveloped results with other primary load cases. I've always been able to manually write the moving load command lines in the input file, but I just can't seem to wrap my mouse...
Is anyone aware of the results of a University of Toronto study having been conducted on the use of Hollo-Bolt fasteners for primary truss bridge members? I am currently designing a truss bridge for a manufactureing plant and would like to use HSS rectangular shapes for the primary truss...
A question came up recently whether sidesway web buckling for wide flange beams being used for temporary needle beam shoring (laterally unbraced) could be satisfied by wedging in hardwood blocking on both sides of the web between the top and bottom flanges at the bearing (jacking) points rather...
I recently advocated before an Appeals Board for a client wanting to place a moored float with an aluminum gangway attached to a stairway (already existing) in a tidal river. The client called moored float, a dock in the building permit application submitted to the code enforcement office. The...
