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Considering the following: -square -single storey -conventionally framed structural steel braced frame -OWSJ's & metal deck w/ diaphram action -HSS columns and wide flange beams -diagnol bracing on each of the four exterior walls What is everyone's opinion on the ideal braced bay locations and...

Hi, I am trying to determine the bearing capacity of old 1920's terracotta hollow block walls (See attached photo). The wall is approx 8.5" wide. We are installing windows lintels which will put point loads on either side and I am concerned about crushing the block.

Anyone have any documentation on simplified approaches to P-Delta effects, particularly with respect to 3 or 4 story wood framed buildings. (I am hoping for a simplified approach or a document that explains the pseudo load approach better)

This might sound like a silly question, but the reference manual i'm reading confused me. When considering side thrust and weak axis bending on a monorail I understand that you consider only one flange to contribute to weak axis bending strength. However, in this design example i am reading...

Does anyone know what shear capacity I can expect (if any) from end nailing into wood lumber. (i.e. nailing through one piece of lumber into the end grain of another piece) Or if you know where I can find such info that would be great! I have looked for quite a while now and can't find much.

Anybody have an idea of what strength rebar was (in Canada) for a 1960's building? I assume around 300MPa.

I'm looking for average unit weights (guidelines) for typical soils. i.e. saturated and unsaturated unit weight of sand, silt, clay

Hi all, I have not done aluminum design before. I need a couple aluminum channels sized for my cottage. Approx 2.5ft wide section of stairs that is very steep (close to ladder steep) and approximately 9ft tall. I want to use two aluminum channels each side of stairs and bolt small horizontal...

Should I be worried (i.e. take into account) eccentric loading on a steel roof purlin of about a 1.5 degrees. The roof has a 0.25 to 12 slope. The steel roof purlin spans ~22ft. Or is 1.5 degrees considered negligible once the steel decking distributes the load. Your thoughts?

Background: I am designing a structural concrete slab floor for a new supermarket/grocery store. Does anyone know where I can find design recommendations for supermarket (grocery store) floor loading. I am assuming around 150 psf for the common area and around 200 psf for the...

I have a retaining wall that is ~2ft from the property line and approximately 7ft high. The contractor had gone ahead and installed piles prior to our involvement. The retaining wall is holding back about 6.5ft of sandy till. We would typically use buttresses with piles set back from the...

I have a steel beam in a residential appliation that has a wood nailer place bolted to the top of it. I am wondering how one can achieve proper lateral bracing using wood screws attaching the wood top plate of the beam to the wood joists (which are @ 16" o.c.) Most literature I read refers to...

Okay, I'm looking for suggestions. Our city is having difficult with residential foundation contractors not installing concrete cast-in-place piles to the specified depth. There are no inspections during the installation of the piles by the city. Are there any instruments or methods of...

I am adding 127x127x4.8 HSS to the bottom of an existing W360x33 in order to obtain increased moment capacity inreased moment of inertia. Are there any considerations I need to take into account when doing this from a design perspective? The Beam is laterally braced. I am assuming I use the...

Hi, I was inspecting a 1979 condo unit (in Canada) that has original Wood I-Joists with no clear identification on the drawings or on the product. Does anyone know how I can detemine the capacity of such a product? Currently the joists appear to be under-designed based on deflection and we are...

I designed built up wood columns for a 4-storey condominimum based on the Canadian Wood Council - Wood Design Manual. Here is the question: For a specific point load the design manual charts say I need a 4 ply B.U. column. Does this mean I need a 4ply column (i.e. 4 cripples) with a king stud...

This may sound like a stupid question, but hey, as they say, no such thing as a dumb question..... Anyway, Do I need to include the selfweight of the concrete pile in the design of the pile itself. I am designing on a basis of skin friction only.

Perhaps this is already posted somewhere (I looked) But I heard that in a steel framed building it is only neccesary to brace 3 of the 4 sides (i.e. with diagnol steel bracing in 3 bays of a rectangle building) . The building in question is ~50ftx150ft. Can the roof diaphram act as a 'beam'...

Please excuse my metric units (<--Canadian) I am designing a foundation wall for a condo that is approximately 12m below grade at the base. The condo foundation is stepped so the lowest portion of the wall is simply supported and has a clear span of ~2.5m. Silty/Clay soil and the geotech...

I am designing a concrete wall that backs into a hill for a condo. The concrete wall will hopefully be 10" to 12" thick. Factored Moment --> 107kN*m (79,000 lbs*ft) Factored Shear --> 255kN (~57,300 lbs) Based on my calculations, I will require shear reinfocing (i.e. stirrups of some sort)...