Search results for query: *

From my understanding it is not required (as per the building bylaw), as long as the floor area is less than 600m2 and it is less than 3 storey height (which is the cirteria for Part 3 building). However friend advised that it is.... Anyone from Vancouver can answer this? Thanks,

I was asked to look at renovation (with changes of structure) of an single family house that was built in 1993, but there was no seismic holddown at all (the drywalls have been removed so it is obvious). Is it that the seismic clause introduced after 1993 to NBCC?

Sometimes when I use steel beam due to the deflection limit for large span, for column I want the column width to match the beam flange width. Say for W 12 x 53 steel beam, the factored reaction force is 45000 lbf, I want to used 5 1/4" x 9 1/2" PSL beam as post, but just use the factored...

I have one big deck in a single family house on the main floor and one balcony on the second floor. Both are the similar size 40' x 15'. The National Building Code of Canada specifies a live load of 4.8 kPa for a deck (intended to be a assembly area), which is 500 kg/m2. Isn't that too much for...

Hi all, I have a strip footing (with a pedestal wall) to take a point load from timber column. The load is around 8 kips (factored). Just wondering if it is necessary to add 4 vertical rebar at the column location. I thought is not, but maybe I am wrong. Thanks, Alex

Hi All, Is it practical to bolt two PSL beams? Due to large span and large force from column upstairs, a single 7” x 11 7/8” PSL is not enough, therefore I am thinking to use two PSL beams instead of steel beam. Alex

Hi All, What is the black thing on top of the stud wall. Is it used to secure the beam and joists? Thanks, Alex

Hi All, What do you think is the cause for the vertical crack in the basement wall of single family home as shown below? It was discovered in several places of an 50 years old house. It seems to be an old cracks but does not seems to be due to shrinkage or temperature. My first guess will be...

Thanks for all the inputs. I have updated the threads with more detail information.

Did any one encounter the situation where there is a steel beam on top of header like the sketch below? The reaction force on the steel beam end is around 20 kips so the bearing is not a problem. This steel beam is located on main floor and uplifting is not an issue. The span is 16 ft and the...

Hi Everyone, I am wondering if a 5 1/4" x 9 1/2" PSL beam can be used as a post, in case that a 5 1/4" x 7" PSL post does not provide enough axial load capacity and bearing length. Thanks, Alex

Hi everyone, Just wondering what is the primary reason to have double rim joist for wood frame structure. I have seem some engineer doing that for exterior shear walls. Is it for the purpose of transferring shear force from upper floor to lower floor? If that is the case why don't they just use...

Thanks all for your inputs and seems my previous sketch has made some misunderstanding. I have updated the sketch and add some more details to the problem to for your information. Alex

Hi everyone, In my area, it is common practice to have 1.5" concrete topping (25 MPa) on the floor sheathing (for radiation heat purpose). The concrete topping is usually plain or with 6" wire mesh. Normally when we look at the floor diaphragm capacity, we only look at the panel thickness and...

Hi Guys, This is a moment frame structure I want to use in combine with wood panel shear wall in a single family house, due to the reason that there is not many interior wall at that location. I have used Sap2000 to model this moment frame, and it appears that it gives very similar deflection...

Thanks all for your inputs. Appreciated!

Hi there, I am designing a header in exterior wall (2x6 stud wall) and due to the large snow load, my factored reaction force at one end of the header is about 30 kips. The head is 5 1/4" x 11 7/8" PSL beam and I would like to 5 1/2" x 7" PSL post, but I am worried about bearing capacity of the...

XR and Jayrod, thanks for your reply. It makes sense to me.

Hi everyone, I was using Forte to size my beams and there is one question: The beam is 5 1/4" x 11 7/8" PSL beam, the factored reaction force in one support is about 60 kN (13,500 lbf). I am using 3.5" bearing length and the program is showing that the beam will fail in bearing ( the bearing...

Hi All, I am new to wood frame design. It seems to be a common practice in my area (and I also read some threads in this forum talking about this design) that for a flat roof , people are putting a 2x4 purling on top of roof rafter for cross ventilation purpose. The roof sheathing is then put...