Hello fellow Engineer,
Our office is asked to evaluate an existing roof framing structure that was modified previously due to the addition of a higher roof. Please see attached photos below.
You will notice that, in order to handle the new drifting snow load, the following modifications were...
Hi everyone,
When you have a chance, could you please take a look at my following questions and attached sketches (2 PDF files), and let me know your thought/ comments.
• Code: ASCE 7-10
• Ground snow load: 50 psf
• Ce = 1.0
• Ct = 1.0
• Is = 1.0
• Cs = 0.75 for 10:12 roof
• Cs = 1.0 for 7:10...
Dear fellow Engineers,
I am new with wood design in general.
While trying to put together details for roof diaphragm to shear wall connections, I have some questions about the topic.
Thru my research in this forum, I found these two terrific threads (thread507-388238 and thread507-285903)...
Good morning,
I am checking an existing bridge (reinforced concrete deck, welded girder with spiral shear anchor) for capacity to support construction equipment.
Record drawings (dated July 1955) show that spiral shear anchors were used.
Does anyone know and/or have any literature on capacity...
Dear forum member,
Currently I am putting together details of temporary bracing that will be used during the erection of the first new I-girder of a new bridge.
We have quite a few debates/discussions within our office about lateral torsional buckling mechanism, bracing types/configurations...
Hi,
I am checking an existing elevated floor slab being used as machine shop for the installation of a CNC machine. The building was built in the 1950s.
According to the record drawings, the elevated (4-span) slab was designed for 200psf superimposed live load.
My calculation and model confirm...
Dear Eng-tips forum users,
I am currently asked to work on a 35ft (high) missile barrier/fence and about 34.5ft in width.
The prelim layout has called for 5 equally spaced posts (4 x 8.88’ spacing) and metal mesh with 52% of open area is proposed. The metal mesh would run from about 6 inches...
Hello,
I was asked/assigned to design an elevator shaft in a wood framed building with 10'-6" floor to floor height. The building lateral resisting capacity of the building is provided entirely by roof/floor diaphgragms and shearwalls. The building is under Seismic Design Category B (per IBC)...
Let look at a rectangular building that is 40ft in width and 100ft in length. The calculated end zone length/width (2a) is 8ft.
In order to come up with base shear, I have been calculating interior zone length by subtracting the width or length of building by (2) end zones length (2x2a)...
Hello,
I need to connect two perpendicular pipe sections together using 2 pairs of u-bolts and a steel plate. I am concern about the capacity of this connection against sliding at the u-bolt and pipe interface. I founded several similar details, stand-off mounts in particular, shown in antenna...
Hi everyone,
Currently, I'm working on the addition to an existing mezzanine. The existing floor framing system consists of FSD composite concrete deck, composite filler beams and girders.
I am planning to utilize the same framing system for the new addition by adding one new girder parallel...
I am trying to determine the capacity of existing roof joists for new HVAC units.
I found the identification tags, which read "06-8656 NJ 12" "20-B7".
Here are measurements that I took:
The joist depth is 20 inches.
Bearing depth is 2 1/2 inches.
Top & bottom chords are cold-formed steel...
