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Introduction: For punching (2-way) shear check, the ACI says to assume the critical perimeter location along a line located d/2 from face of pile. However, ACI 318-19 Sect. 22.6.4.3 also says that if an opening (or presumably an edge?) is located closer than 4h from the face of the column (in my...

Thank you rapt. I concur. I haven't seen any reference in ACI or PCI regarding this common construction concept.

Designing a pile cap for an elevated marine wharf platform, as follows....Phase 1: Install bearing piles at 15-ft x 15-ft grid pattern, with tops extending above high tide; Phase 2: Place 3-ft thick precast reinforced concrete pile caps atop the piles; Phase 3: Place 2-ft thick precast...

Thank you 1503-44. To be clear, what would the lateral load be, say for designing a retaining wall for a theoretically very deep, but say only 1-ft wide column of fluid? Would it be equal to the area under the lateral pressure diagram, or would it be limited to the lesser of that area and the...

Hi everyone. I am calculating wall pressure of 3120 psf at bottom of tank, with the resultant force = 78 kips per ft of wall, but the wt of the water in the containment structure is only 16 kips per ft of wall. In designing the concrete walls, can I use lateral force of 16 kips or do I need to...

Hello, The following scenario and question is for structural engineers who design bridges: Designing a multi span bridge over a creek, say 12 spans each 40-ft for total 480-ft. Each span substructure is comprised of concrete cap supported on pipe piles. The cap and top of piles is approximately...

Does anyone know where (in the ICC IBC building code) I might find geotechnical resistance factors for LRFD design (or F.S. for ASD design) of driven H-piles for buildings? I am trying to determine factors of safety for driven piles that are tested and validated via PDA and CAPWAP for...

Very interesting. Thank you much for that clarification and question. Yes, I think I may look into other options.

Thank you PEinc. I do plan on installing them on a 30 deg angle with the bond zone likely at least 30 feet in from the wall, so that should get me at least 15 feet of earth above the bonded zone (with wall installation point 3-feet below the surface). However, I hadn't considered the passive...

Hello, I am designing a new steel sheet pile (SSP) retaining wall with grouted tie-backs. I plan to design the SSP as a cantilevered wall up to a certain height, backfill up to that height, install tie-backs 3-feet below that certain height, test the tie-backs, and then finish the backfilling...

Greetings fellow engineers, I am in need of simplified advice in regards to estimating (via hand calculation) the side resistance strength of an existing drive 14-inch OD Open-End pipe pile in sand, using the FHWA Nordlund method. Let's assume this to be a non-displacement pile and it's...

Greetings. Is anyone familiar with the FHWA (Nordlund) empirical method for designing H-piles in sand? I see that the "box" area (4-sided perimeter area) is to be used for calculating side friction resistance. But I am unclear as to which area to use for calculating the toe bearing...

I appreciate the fast replies. Thank you, all.

Greetings, fellow Eng-Tippers. Numerous authors suggest assume 10D for loose soils, 15D for medium soils, and 20D for stiff soils, for critical depth. I am analyzing an existing 60-ft long pile that was driven thru sand, and am trying to determine the SKIN FRICTION capacity using empirical...

We just received a few tons of fabricated structural steel for the erection of a pipe rack at our chemical manufacturing plant in Texas. The fabricator is an AISC certified shop. Am I required by law to have this steel inspected by a qualified third party in order to erect it?

Thank you, rapt and structuralengr89.

Can someone provide guidance on how to specify the length and width of each floor deck panel for a known plan dimension? What is the minimum overlap (in the length direction) and minimum sidelap (in the width direction) requirement? And how is this accounted for when preparing the bill of...

Thank you all. If I come across any code that adresses this limitation (if any), I will gladly post it here.

Thank you for the replies. Yes, I agree that grout is addressed in the construction cose but mortar does not seem to be addressed to the point for which I am addressing. To put my question into a hypothetical situation, is it permissable for a contractor to build a 50-foot high x 8-foot wide x...

I am putting together a set of construction specs for a new 15-foot high building with 8-inch CMU exterior load bearing walls, with vertical reinforcing every 32-inches C/C, and I would like to know how many courses high can the blocks be laid before the contractor has to stop and wait for the...