Was wondering if anyone can offer some wisdom on how you handle the generation, review, filing & long-term storage of your engineering calculations?
Some thoughts:
1. Paper (hand) calcs -> in pen or pencil? (Pen fades after a while?)
2. Simple wl^2/8 quick checks versus detailed finite...
Just wondering if anyone has some good notes on dynamic analysis of precast stadium bleachers for vibrations(or dynamic analysis of bleachers in general).
I know Bob Mast at PCI has a good article and the PCI Design Handbook is also good, but I am looking for some background dynamics notes to...
Assume a saw-tooth high roof, with 2 peaks and a low roof on either side of the saw-tooth roof which is subject to drifting loads. The peaks of the saw tooth are 8.32 m high (27.3 ft). Using the National Building Code of Canada, what plan dimensions (w and l) would you take for the upper roof...
I am reviewing the design of an existing craneway using precast columns, and beams supporting 25 ton and 30 ton rolling cranes.
Does anyone have any reference info for the design of craneway beams and columns in general? (Steel or precast, should be similar).
The National Building code of...
OK all you structural analysis & design experts....I have the joy of analyzing & designing a stage / canopy that looks like a fine piece of oragami (see attached)
Any suggestions on how to approach this one?
I am looking at an existing form set-up for a steel self-stressing form in a precast operation. They want to stress 4-0.5" diameter strands, which will react against the steel form at an eccentricity from the centroid of the form.
Would appreciate any help from the steel design experts out...
I have a steel plate in flexure, length is 36", plate dimensions are 1/2" wide x 8" deep (in direction of bending).
How would I check the class of the rectangular plate in bending, using the Canadian steel code? (Want to see if section is Class 1, 2, 3 or 4)for calc. of Mr.
Does anyone have any guidance on the analysis of precast raker beams for stadiums / arenas?
My two concerns are:
1. Vibration analysis
2. Accounting for the in-place geometry of the raker beam (the incline of the member, versus a beam that is level and flat) on the statics of the member.
Does anyone know how to design a built-up section for a steel spreader beam, using two channel section (toe to toe) to form a box section? This is an existing spreader beam, and there are welds along the seams (at the toes of the channels top & bot.) but we need to verify beam capacity.
I am...
I am wondering how one goes about calculating the impact load of a front end loader wheel/tire against a bumper wall? (See attached sketch). We have a weigh scale, so I could verify the weight of the loader but I need help to come up with the impact force "F" in order to design the bumper wall.
Let's say you had a series of steel channels embedded 16 inches into a large concrete footing and the channels cantilevered vertically from the top of the footing about 5 ft. Clear spacing between channels is 12 inches.
These are being designed as precast panel storage "racking" blocks, with...
I have a question regarding the design approach for cast in place concrete walls...
Lets say you have a 10 ft deep (high) continuous wall, which sits on piles spaced at 10 ft o/c (therefore it is a deep beam by defn). Wall receives vertical loads (applied to top of wall) from the load bearing...
Does anybody out there have any recommendations for the design of precast sound walls (the kind used to isolate residential areas from freeway vehicle noise)?
Typically, I have seen precast columns sitting on CIP piles, with the columns notched to receive a drop-in precast panel in between each...
I have a 3 level precast column, with corbels on one side, supporting precast beams at each level (The column is an end column in a bay). The columns are tied at each floor at the tops of the beams, and are braced in the other direction by the floor. Based of the column is assumed to be...
Lets say you have a stairwell, made out of 4 precast walls. These walls are connected at the corners with welded steel connections, designed for the forces experienced at the joint interfaces.
What would the effective moment of inertia of the box be in this case? If I compare the above system...
A guy in my office (who isn't an engineer by the way) had a theory. I believe the bridge spanned over the river without intermediate supports....one would have to assume that there would be some pretty significant expansion joints at each end of the bridge, due to the very long span.
Now let's...
Lets say I have a slab cantilevering 16" from the C.L. of a steel beam. The architect wants to support brick cladding a further 12" beyond the end of the slab, by use of 6"x6" HSS vertical tube hangers + 4"x4" HSS spacers welded to the hangers + a 4"x4" contin. shelf angle, supporting the...
