I design many oceanfront homes in hurricane areas. Architects often specify wood roof decks placed on sleepers over the flat roof areas (1/4"/ft pitch to drain). In the past the wood decking and sleepers would be installed like pallets so that they could be removed to allow for cleaning and...
I have a one story 50' X 86' building with 22 ga type roof deck on steel bar joists at 5'-6" o/c and spanning 50 feet. I designed the metal deck roof deck diaphragm and it can tranfer the lateral loads to the shear walls on each end. My chord force for the diaphragm is 4.2 kips. I am using...
Does the load duration factor (Cd) of the NDS apply to wood connections using nails, screws, and/or bolts? My copy is a bit outdated and the page with that should have that info on it is blank.
I am the engineer on a project where the contractor broke off several anchor bolts at the top of leveling plate. Is their a prequalified weld for using a "plug" weld for filling in the holes in the base plate which will sit on top of the leveling plate, to the top of the seared off anchor bolts?
I was asked by a code reviewer to provide backup for the attachment of a tile roof to the roof sheathing in a 120mph wind zone. The supplier does does not have any engineering backup, just a spec calling for 2 nails or screws per tile. Anyone out there ever design a roof tile attachment?
Short...
I am working on a prject which the architect has a wall system using thin stone veneer (1" thick) applied to rigid insulation which is screwed over a vapor barrier and exterior gyp board into metal studs. Metal lath and a scratch coat is applied over the rigid insulation to adhere the stone...
I just looked at a 11 year old house where a 2x12 first floor joist had a sudden failure leading to a series of (4) 5" deep x 3/8" wide vertical cracks formed in the the mid depth of the 2x12 joist about 8" on center from the support. The cracks stop about 3" from the top...
I am the structural engineer for a large residential project in Long Island with 3" limestone panels for part of the facade. We are looking for an independent engineer who handles the design of the limestone panels, connections, and detailing. Anyone ever been involved with these before...
I am checking an existing barn silo which is being added to a building that I am designing. The silo will be empty (used a stair tower). Does anyone know how to check an empty silo for wind pressure. In particular I am concerned about localized bucking or cruching of a side, much like when...
I am involved in converting a second floor space for use as a horse stable in Manhattan for storing horses used in the carriage rides around the park. The building code does not address this use in it's allowable design live loads. My inclination is to use 100PSF for yards and terraces but...
Does anyone know where I can get allowable loads for plywood shearwalls with lightgage metal studs. I see no point in using X bracing if plywood sheathing is to be used. The IBC only list values with wood studs.
I am investigating a building constructed in 1926. How do I determine the diameter of a rivet from the head size? Is there any way to verify the material, if it is A-502 grade 1 or 2 or was some other material used at that point in time?
I am investigating a theater constructed in 1926. What were the allowable bending, tensile, and shear stresses in steel at that time? Does anyone know of a good resource for identifying steel shapes for that period.
How do I determine the diameter of a rivet from the size of the rivet head...
