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Hello - I have a a client that has retained me to design a foundation. The foundation is for a double-wide trailer. Each trailer has two I beams, four total. This is a used double wide so I cannot ask a manufacturer for beam specifications. The client states that the beam is 10 in deep and 2...

Hello - I am designing a timber frame structure in a seismic design category D area. The structure will not have light frame wood walls sheathed to provide shear resistance. The structure is two stories with the first floor being a slab and the second floor wood diaphragm. I would like to use...

Hello - I am designing a small deck to replace a dilapidated deck on an old historical brick building. I am assuming the brick building is at least stacked two bricks wide. I am using P.T. joists and ledger with a steel drop beam to support the deck. My issue is how to attach the deck ledger...

Hello - I am working on designing a grade beam foundation supported by micropiles. The foundation will be supporting light residential loads and the loads have been calculated using LRFD load combinations. The contractor is choosing to use micropiles as opposed to overexcavation. These two...

Hello - I am designing a notched W-beam that is bearing on a large W-girder. The notched beam, as shown in the attachment, is not carrying a very large load. Based on my review I have analyzed the shear and moment of the reduced section due to the notch. I have included a web stiffener even...

Hello - I would like to get opinions on a pile design software that can design grouted micropiles and steel tube push piles. I would primarily use it to verify bearing capacities under for mew and existing structures.

Hello - I have a large glulam gable truss that is supporting 14" LVL purlins @ 24" O.C. (see attached detail). In the plan view the purlins are spanning 18 feet from truss to an exterior wall for bearing on the opposite end of the glulam gable truss. I am calling out that full blocking is...

Hello - I am designing a garage with an ADU above. The soils are a moderately expansive clay requiring a 2 - 3 overex. Groundwater has been encountered at approximately 3-4 feet below grade. Due to this I am designing the foundation as a mono pour slab with a turndown. The turndown will extend...

Hello - I am designing a basement retaining wall that is 60' long by 13' tall. The home owner is adamant on providing two buttresses in the basement of the retaining wall. My question is, with addition of the buttresses, will a two-way slab action be created? Thanks in advance.

Hello - I have a barrel roof to design where the main beam will be arched as shown in the attached image. The arch will be achieved by cold rolling HSS 10x6x3/8 tube steel. My question is, now that the steel has yielded, how will this change my design calculations? Thanks for the...

Hello - Does anyone have an example calculation of swell/consolidation potential for a foundation based on a swell/consolidation test? I assume this would include the boussinesq bulb per layered depth as well as the swell % and psf of the clay. I appreciate any input.

Hello - I have always assumed that the shear strength of an OSB sheathing panel is greater when installed horizontal (8' direction perpendicular to studs) than vertical (8' direction parallel to studs). I have been reviewing table 4.3A of the SDPWS 2021 and it doesn't state which direction the...

Hello - Per the attached image I cannot drop a column down from the ridge beam and valley rafter connection supporting them. Due to this I will be supporting them with a cross beam. I am looking for a hanger type connection that has three buckets to connect the (2) valley rafter and (1) ridge...

Hello Structural Folks - I need a peer review for a structure I have designed. It is a 30x40 3-story shop that has apartments on the third story. The first two stories are ICF concrete walls with the apartments having a modified timber frame / stick built design. It is my first structure...

Hello - I am a residential structural engineer trying to correlate the amount of overexcavation required in order to approximate post construction heave and settlement of less than 1 inch. For instance, I just received a geotechnical report that estimates the swell potential of the soil to be...

Hello - I am reviewing a geotechnical report. My questions stems from the recommended bearing capacity of the soil being stated as 3000 psf at 12 inches below grade. Later in the report it is noted that the soil stresses beneath the foundation should not exceed the shear capacity of the soil...

Hello - I am providing the structural design on a small timber framed carport with a pier foundation, see attached. The structure will eventually have a roof on it. My client has already secured a swell test for the area based on the cabin she has built on the property. The swell test shows a...

Hello - I was wondering if anyone has any experience designing residential foundations using the bearing strength from a hand penetrometer. I understand that the soil may not be uniform but couldn't multiple readings be taken and the average of them be used for design? Does anyone use a factor...

Hello - I was wondering how other residential structural engineers have been streamlining their workflows when dealing with the tedious detail drawings so I thought I would ask for recommendations. Most of my time is spent ensuring the detail drawings, for connections primarily, are shown...

Hello - I am trying to calculate wind pressures and I am confused on the basic wind speed as noted in ASCE 7-10 Chpt 26. Per Figure 26.5-1A for Risk category II (residential) structures the design 3-second gust is 115 mph. This is self explanatory to this point. Where it gets confusing is the...