A client purchased an existing pre-engineered metal building. The walls and roof have about 4" vinyl-backed fiberglass insulation, which is typical in the metal building industry. The client has what we thought were roof leaks, but there appears to be a more serious and widespread problem with...
We poured a 6" thick concrete slab, reinforced with 6x6-W2.0xW2.0 wire mesh. The contraction joints were sawn at 15' x 20' centers. (Let's leave the debate over proper joint spacing for another day!)
I now have some very narrow cracks running in the middle of the 20' bays. The cracks are...
This is WAY off subjet, but...
We fold a lot of blueprints and technical cut-sheets for incorporation into 3-ring binders. This means the documents get 3 holes punched in the margins.
Some years back, I saw some instructions on the best way to fold large print media (24"x36" and...
I have to design a retrofit suspended floor slab on the second floor of a 5-story warehouse. The floor is to support a live load of 150 psf, along with a forklift load of 4.0 kip per wheel on a 40" wheel center (8.0 kip per axle). The existing columns bays are spaced 10'-8" x 25'...
I'm extending an existing 7-1/2 ton monorail beam. The beam is a "patented" welded plate beam spanning 28' between supports. The existing beam measures 18.75" tall, with a 5/8"x10" wide top flange, a 7/8" x 3 1/4" wide bottom flange, and a 5/16" thick web...
