I've got a Pre-Engineered Metal Bldg (PEMB) with the typical steel rigid frames, Z-purlins, and standing seem metal roof. The job is to install Solar Panels on the roof with S-5 clamps attached to the standing seem roof (see attachment), and maintenance crews will have to routinely access and...
Hi,
I am running Ensoft LPILE, to check the structural strength capacity and to design the reinforcement in a non-cased round bored shaft. I'm running the "Non-linear EI Only Mode" and creating a interaction diagram. The program can provide a graph of the interaction curve (Axial thrust force vs...
Hello,
I am inquiring if anyone knows of any guidance that simplifies (with conservative equations) the complex soil structure interaction of deep foundation groups? I am looking for guidance that has hand calculation equations for the distribution of the vertical & lateral loads on the deep...
Hello everyone,
I would like to know what types of small equipment are available to drill 3 ft diameter drilled pier foundations to a depth of 10 ft within an existing structure? Is there anything on the market that can fit through a standard door width? Drilled piers will extend through a...
Any guidance available for estimating the remaining service life of existing bridges? Customer wants this information to program future repair/replacement funds.
I have a 75 year old railroad bridge with steel stingers controlling the load rating in flexure, with no section loss or corrosion...
Can someone explain to me the difference between stringers and girders? I've got a project involving a concrete bent railroad bridge with multiple steel stringers/girders for the super structure framing. It appears the terms "Girder" and "Stringer" in the bridge industry are used intermittently...
I'm interested in the ACI 530 code requirements for steel lintel anchors into masonry (CMU) walls.
ACI 530 Chapter 7 Seismic Design Requirements 7.3.2.8.1 states:
Horizontal reinforcement shall be provided at
the bottom and top of wall openings and shall extend at
least 24 in. (610 mm) but not...
HI,
I would like to know what area of ASCE 7 and the IBC a power pole with a transformer falls under, for structural design. I think it falls under ASCE chapter 15 Non-building structures not similar to buildings? I see in Table 15.4-2 the design coefficients to compute the base shear. However...
Hi,
I am looking for litature that gives concrete strength between initial and final set. Most designers assume the concrete strenght is 0 psi during this construction phase, but is that really the case? I have a mix design where the inititial set time is 85 minutes and the final set time is 185...
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I am looking for refferences to solved equations interms of different loads and span lengths for continious beams with 3 spans. I see that my 13th edition of the AISC table 3-23 has 3 different uniform load cases, that gives coeficents. I need something like this, but for a...
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I'm looking into the anchorage of Ductwork, plumbing, cable trays, and conduit bracing into concrete. I understand the calculation of horizontal seismic force Fp. My question is in regards to the anchorage forces, and I see ASCE 7-05 section 13.4.2 refferences this. I'm wondering how...
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Why are deflection limitations specified as a fraction of the span length, such as L/360 or L/240? I'm having a hard time picturing this criteria, it apears to be more of a deflection slope or gradient, rather than a maximum deflection limit, such as 1" or so. Can someone show a simple...
