Eng-Tips is the largest forum for Engineering Professionals on the Internet.

Members share and learn making Eng-Tips Forums the best source of engineering information on the Internet!

Register Log in
  • Congratulations dmapguru on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  1. magicming

    Replace partition wall under roof joist with beam

    That's right. joint is not an issue for this case.
  2. magicming

    Replace partition wall under roof joist with beam

    Hi Ron247, good to receive your reply. It is a regular old detached one-storey house, so I think 20 psf should be enough. The house is at Toronto. We have Ontario Building Code, but very similar to National Building Code of Canada that is similar to code in the states. I agree the upper ties...
  3. magicming

    Replace partition wall under roof joist with beam

    Thanks for your detailed reply, Ron247. The roof span is 24'. Rafters are 2x6 and 16" oc. A ridge beam is at the top. Collar ties (technically not, as they are installed at the lower side of the rafters, about 4' from the bottom) are 2x4, 32" oc. Vertical 2x4s are spaced about 9.5' and...
  4. magicming

    Replace partition wall under roof joist with beam

    Thanks for your reply, Lexpatrie. This is a very old house, maybe built before 1950s. For the rafter, I believe there will be more live load. In Toronto there is more than 20 psf live load. But for the bottom cord, as it doesn't have vertical forces transfer from the rafters (only horizontal...
  5. magicming

    Replace partition wall under roof joist with beam

    Thanks for your reply, Bear. One picture is from video screenshot, the other two are from actual pictures. As seen in the attached picture, the collar ties are doubly spaced as the rafter. I believe they are resisting horizontal thrust but the main resistance is from the fastened bottom cords...
  6. magicming

    Replace partition wall under roof joist with beam

    Hi there, It is my first time to check roof joists and not sure if I am right, please give me some advise. I have a client asking me the recommendation to replace a section of partition wall (2x4 studs, 16" o.c.) under the roof joists by using beam to support the roof joists (bottom cord of...
  7. magicming

    House floor post on exterior foundation wall

    @phamENG, didn't get a chance to do that yet
  8. magicming

    House floor post on exterior foundation wall

    @jayrod12, yes, it is. The designer used the foundation wall to support the steel posts, didn't increase the loading area. It completely relied on the foundation wall to spread the high point loads from posts.
  9. magicming

    House floor post on exterior foundation wall

    Thanks for all your inputs. It is really a great chance to discuss with you all here. 1. To allow you all see clearer the design, I attached one section of the structural drawing from basement to second floor. P6:HSS 4"x4"x1/4" column, B17 = W10 X 45, B18 =W10 X 54, B19 =W12 X 50, B20 = W12 X...
  10. magicming

    House floor post on exterior foundation wall

    Thanks, @a_urbs. Very appreciate your suggestions. As I have the drawings, I do have the intention to run all the calculations myself to see how does it look.
  11. magicming

    House floor post on exterior foundation wall

    Thanks for your reply, @SWComposites. I didn't eyeball the foundation. I have the design drawings. That triggers my deep interest.
  12. magicming

    House floor post on exterior foundation wall

    Thanks for your reply, @a_urbs. I know the information is limited here. If you need more information please let me know. I can give so we can have further discuss. And yes you are right, this is a high end house, worth more than 6 million. I want to initial the discussion that the steel post...
  13. magicming

    House floor post on exterior foundation wall

    Hi there, I saw it a couple of residential houses design drawings. The designer used steel beams (like W10x45, W12x50, even W14x90) for the second floor load and one end of beam was supported by steel column (HSS 4"x4"x1/4"). However, the column was placed at the exterior foundation wall. I am...
  14. magicming

    Flood hydrostatic and hydrodynamic design

    Thanks for your comment. @lexpatrie. And yes, ASCE 7 only specifies the minimum loads, but ASCE 24 covers the flood design. It looks the previous design was not overdesigned but underdesigned. The engineer didn't consider the flood situation at the conservation area but when my client...
  15. magicming

    Flood hydrostatic and hydrodynamic design

    Great and thanks for helping, Jerseyshore. I will dig into that manual.
  16. magicming

    Flood hydrostatic and hydrodynamic design

    Thanks, JStephen. It seems I have difficulty to get access your presentation. Just wondering for flood, like 0.8m above existing ground, should both hydrostatic and hydrodynamic loads be applied to the ground floor walls and also the foundation? Also, for the hydrostatic load at foundation...
  17. magicming

    Flood hydrostatic and hydrodynamic design

    Hi there, I have a client already having the design drawings in Toronto. But the engineer didn't do design for the flood pressure, including hydrostatic and hydrodynamic loads. He doesn't like the previously engineer so he reached me for help to do some calculations for the current design or...
  18. magicming

    Bridge check when demolishing by excavators

    Hi Lomarandil, thanks very much for your suggestions. since the actual track size of one excavator is much smaller than half of the deck, is it reasonable to consider the excavator as point loading (factored of course)? Also, regarding the bridge capacity as the demolition goes, what are the...
  19. magicming

    Bridge check when demolishing by excavators

    Thanks, BrianPetersen. I think I get what you mean.
  20. magicming

    Bridge check when demolishing by excavators

    Thanks for reply, dik. I did see excavators on bridge to demolish the deck. There are girders supporting the deck so it is safe to demolish the deck after the structural stability check.

Part and Inventory Search

Back
Top