I was asked about some LSL wall studs that are bowing and I can't figure out the cause so I wanted to see if anyone else could provide some insight.
House is 42'x32'. Roof trusses (vaulted) span across the 32' dimension with gable ends. Bearing walls on each side are 15' tall. End walls (non...
I have been asked to look at an existing framed ceiling supported on partition walls. The walls are 3 5/8", 25 ga. drywall studs. Is there any documented load carrying capacity of these studs?
I am designing the foundation system for a metal building. Due to poor soils and large building loads (100' spans and bridge cranes), the building will be supported on auger cast piles. The outward thrust of the exterior columns is ~30 kips. Additionally the high interior slab loads may cause...
I have been asked to design the framing for a sculpture. The frame is generally welded angles with a steel plate skin. The skin will be weathering steel. The interior support angles are being proposed as A36 painted (except the base angle). My main questions have to do with the base of the...
We have a project with reinforced concrete masonry specified with a strength of f'm = 1500 psi. The grout has a minimum required strength of 2000 psi. Testing of the grout came back with strengths of about 1500 psi.
What options are avaialble for the contractor at this point? The wall in...
I have a connection where I would like to install an anchor(s) in the top of a concrete slab. The anchor(s) will need to take a shear load but no tension force. The issue I'm running into is the slab has a total thickness of 3" and is supported by 9/16" non-composite metal decking...
I am working on a project that involves cutting an opening in an existing cast in place concrete floor system (mild reinforced pan joists). Our intent was to utilize a new load bearing concrete masonry wall to support the existing pan joists. In this scenario the wall would be built with...
We have designed a steel beam to use as the anchor point for a fall restraint system. We have designed the steel beam for a 5000 lb static load. The client has asked for a load rating that can be posted on the beam. Should the load rating for this beam be 5000 pounds (static design load) or...
ASCE 7 shows that assembly areas have a designed live load of 100 psf. I have been asked to review an existing assembly space that has a soft or spongy floor. During my review it was found that the floor's live load capacity is 50 psf. The building was constructed in 1970 and it has always...
I am reviewing a project that involves some open web floor trusses. This is a wood framed building. The floor trusses are 18" 'L' Truss Joists. I have span tables for the various open web trusses from trus-joist dated 1979. My guess is that the 'L' series became the 'TJL' series at a later...
I am working on a project that involves an existing masonry building. The building is a large two story building with a steel framed floor and roof. The original construction had the masonry exposed and part of the project is to cover this with cement board and stucco. My concern is that at...
I have been asked to design a concrete foundation for a stone monument. The monument has been standing for many years and is constructed of a three pieces of stone stacked on top of each other. A statue sitting atop a somewhat square pedestal sitting atop a rectangular piece of stone. I...
I am checking a building frame used in a metal building constructed in 1987. Can anyone provide any guidance as to the type of steel commonly used in metal buildings at this time? (A36, A572 Gr. 50, A992?) This is in regards to the main building frames that are using tapered sections.
During the course of a project I have been asked about some interior lattice work. The lattice work is constructed of 2x12 maple that spans ~14'. Each end is supported by a hanger off of a wood beam.
My question is how often should the top and bottom flanges be braced to limit warping or...
Wanted to get input from other engineers on exposed exterior tube column base details. In particular how do you handle base details when they are below grade. My concern is that water will at some point find it's way into the column and there won't be a way out as the base of the column is...
I am in the process of designing a foundation for a large fuel tank. Because of it's location the frost depth is given as 6 feet. I was conisdering using a ring wall footing with the interior of the ring wall being replaced with non frost susceptible fill. Both the ring wall and the fill will...
In our concrete specification we specifically exclude the use of reactive aggregates. During the bid process of a job we have received the following question:
"Can a fine aggregate be used that is potentially reactive if it is used in conjunction with a Class F Flyash to mitigate the...
We are in the process of doing a project using Revit Structure. The issue that we are running into is the coordination of the location of the building framing with the architectural revit model.
When we bring in the model it places it at a given location (and rotated 180 degrees) from the...
