I'm using AISC Design Guide 1 - in my situation I have a horizontal cantilever tube imparting the moment on the plate. There is no axial force P, plate dimensions N=11", B=11". Following the examples, I used e=M/P which goes to infinity, so e>e-crit so I have a large moment case.
Going...
Hi, I have a question on calculating deflection on sloped wood roof rafters. I'm working on a project where I am checking existing roof rafters on a residence. I have calculated my dead and live loads on the horizontal projection and using the horizontal span of the rafter to check strength...
NDS Table 11.5.1C shows spacing requirements between fasteners in a row. For loading perpendicular to the grain, and to allow the geometry factor C-delta to be 1.0, the table says the spacing requirement, paraphrasing here, is "spacing required by attached members." For C-delta less than 1 and...
Please pardon for the elementary question here I have on section modulus.
On a particular project I am working on, there is a timber built-up beam I am analyzing for capacity. Basically it is built-up out of three pieces of wood - a large rectangular beam, and then located on each side of the...
Hi all. Am working on analyzing an old concrete slab/T-beam using ACE 318-63. Calculating the section modulus of the t-beam/slab, I of course get two section moduli - one based on the distance from the neutral axis to the top of the slab St, the other from the neutral axis to the bottom of the...
I have the following questions on info in the CalTrans T&S Manual. Please answer if you can. Thank you.
1) Pages 6-24, 8-5 state "surcharge pressures can be added directly to the soil diagram or may be drawn separately." Example 8-1, page 8-8 says "the surcharge can't be handled in the usual...
In designing temporary / short-term sheet pile wall and soldier pile wall earth retention systems, have you in your experience checked for system stability such as heave?
Also, is shear commonly checked when designing said earth retention systems?
Please share your experiences.
I recently reviewed a simple-support steel beam design performed by an outside consultant. The consultant used ASD. Allowable stress he used to check a HP 10x42 was Fy' = 29.4ksi. Why would this have been done?
I have never seen yet in practice or in books of Fy' (value of when flanges...
Question on the USS Sheet Piling Design Manual, version 1974:
Net earth pressure diagram for a cantilever system in granualar soil is shown on page 21. I understand how it is arrived at. But why when calculating the section modulus are various pressures both part of the net pressure diagram...
Hi. I've been away from steel design for a few years and have recently begun reviewing it again, as I'm going to need it for my new job. I am stuck on what appears to be a simple beam problem in my steel textbook and was wondering if you could help.
Select the most economical W section with...
Hi all - I'm new to eng-tips. What a fantastic resource.
After a few years away from design, it looks like I'll be doing some design again, mostly in the temporary earth retention area. It's for my new employer, a bridge contractor, and the earth retention is going to be probably nothing more...
