Excellent Post SteelPE. We have found this outrigger criteria to be the controling load case in some instances as well. Like you, we found this in the Denver Building Code, but choose to apply it to conditions where a fire truck could be on top of our structure in other cities/states.
If the notch absolutely has to be cut into the top of the grade beam (and I would exhaust all possibilities to check if there is another solution), it is possible to dowel on a 'sister' beam to the side of the orginal beam to reinforce the exsting beam and carry load through the area where the...
If the cables are run overhead, be very generous on the load you assign to the cable trays in your design. A few data centers that I work with, when they are cahnging configuration of the equipment, do not remove the old cables if they are on the bottom of the tray. They simply abondon these...
A Vulcraft metal deck catalog has weights for various decks sizes and concrete fill combinations.
Assuming 1 1/2" composite metal deck with 2 1/2" normal weight concrete fill (4" total), the catalog gives a dead load of 39 psf.
Yes, locating the cabinets over a beam will help. Will it help enough????
Is it worth the risk to you that its not enough. If you guess that it will be OK, and you are wrong, are you willing to accept the resposibility for your mistake?
Still think its best to get a structural engineer...
I would still design for the 50 year loads. There is a 2% chance of the 50 year event happening in any given year. During a life span of 20 to 25 years, that is approaching 50% chance of the event occurring.
I would not want to tell the owner after something happened, 'Well, it did have a 50%...
I third csd72.
Fire resistant cabinets will be close to 400 to 500 kg each when loaded. ( The fire resistant file cabinets themselves are very heavy. ) Grouping 6 to 8 of them in a small area is definately something a structural engineer should look at. The localized loading will be way above...
If you select wood treated with borate or ACQ, make sure you properly specify the coating for any metal fasteners in contact with the wood. These new wood treatments corrode metal much faster than the old treatments.
Might check with your architect and see if you can use the 'open mesh' type of screen for the walls. Some of these have an effective wind area of about 1/2 of a solid material. It helps.
Otherwise, yes screen wall verticals get pretty big. Connection to the roof structure can be a challenge as...
I would seriously consider removing the existing slab, putting 4" of rigid insulation down, and casting a new slab for the cold storage portion of the building.
As spats points out, normally, the insulated walls are connected to the underslab insulation. Also, it is unlikely that the vapor...
I can believe the grading operation is casuing the building to vibrate.
A fairly well know case locally is of a hotel's laundry extractor (squeezes the water out of the laundry before it goes to a dryer) vibrating the entire 20 story hotel so bad people could not sleep if they ran it at night...
abusementpark:
Yes, 1,000 studs is a good round number to consider when deciding on whether or use composite steel or not.
I have had converstations with one of the owners of a local steel erection company (who also used to be a practicing structural engineer) and its his opinion, through...
If the platform is greater than some height off the floor or ground, I'm pretty sure you do need a guard rail around the outside.
Embarrassingly, I can't remember what the distance off the floor is at the moment.
FWIW: I usually run #4's @ 16" o.c at the girders. The concrete does tend to crack over the girders due to rotation of the beam spans. I usually set them with 1" clear to the top of the slab. Holds the crack reasonably tight
Oddly, I also tend to get small, but noticeable cracks, over the beams...
I typically do not. The composite deck restrains the concrete from pulling back at a joint, so its not an effective joint anyway.
I alway use welded wire fabric or fibermesh in my concrete fill to control tempature ans shrinkage cracks.
Nutte and kslee:
I am laying out a scenario where design services are bid sepearte from construction services. This is still a common method of project procurement in some parts of the country.
In this scenario, the fabricator is not covered under the design services, and if the engineer...
kslee1000:
Did the owner really save money?? How?
The scenario jike is laying out is true. If you provide connection design services and your competitor is always choosing Option C, all other things being equal, his bid for Design Services will be lower than yours.
However, the connections...
