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Recent content by gmf

  1. gmf

    Floor Joists Supported on Two Adjacent 2"x4" Load Bearing Walls

    I am working on a 24 year old three-storey multi-dwelling residential repair project where I have found wood rot in the exterior walls at the basement knee wall and ground floor. The second and third floor walls are in good condition. The building consists of three adjacent blocks separated by...
  2. gmf

    Acceptable Flexural Crack Width in Two-way Slab?

    The slab is reinforced concrete and yes there are both drop panels and column capitals. There is cracking at each interior bay (roughly middle span), but the worst cracking is located at the first bay. And yes, the cracks start to turn the corner at the corner bays. The overall slab (and...
  3. gmf

    Acceptable Flexural Crack Width in Two-way Slab?

    There are no signs of concrete delamination or exposed rusted rebar. Other than the cracking, the slab appears to be in pretty good condition. The underside of slab is not in a splash zone and I do not see signs of carbonation (this is not a marine environment). Unfortunately, there is no...
  4. gmf

    Acceptable Flexural Crack Width in Two-way Slab?

    In this case, we have a 10" flat slab (6" drop at column; column capitals extend 12" from columns). Cracking appears to be located at the centre of middle strips but does extend through both middle and column strips in the opposite direction. At this point, I am trying to determine if...
  5. gmf

    Acceptable Flexural Crack Width in Two-way Slab?

    I completed a visual review of the underside of a two-way concrete slab as part of a reserve fund study. The slab supports first floor residential space and the structure for three additional residential floors and roof above. Below the slab is a parking garage. The parking garage is below...
  6. gmf

    Effect of Ice Rink Slab Surface Imperfections

    I am working on ice rink slab project where the finished slab has been complete for 3 months. Upon final review of the finished slab surface, holes were noted in the surface. Originally this seemed to be from bubbles or aggregate popout. The client continues to find holes even after the...
  7. gmf

    High Wind Loads in Arctic

    I am designing a small but important building for a small community in Canada's arctic. I am aware that the winds in the area are quite heavy. To begin the design, I obtained climatic data from the meteorological service in Canada as per the national building code (data was not provided in the...
  8. gmf

    Type of Concrete for Rink Slab

    I am in the preliminary design phases of a new concrete slab for an existing arena. Currently the arena floor is sand. The client would like a concrete floor so the space can be used for other than ice hockey during the summer. The rink is covered and relies on natural cooling to create the...
  9. gmf

    Concrete Beam to Wall Connection

    Just some additional information associated with above comments. The 12" column dimension is parallel with the beam so any bending is around the weak axis. The parking layout limits the width of the column to 12". I have contacted additional resources in my area and they to suggest...
  10. gmf

    Concrete Beam to Wall Connection

    I have designed my beams as continuous over my interior columns and the column as a pinned support. I am now wondering how to adequately detail my column to beam connection to make sure I have a pinned support. Any additional help would be greatly appreciated. gmf
  11. gmf

    Concrete Beam to Wall Connection

    The floor is being replaced due to severe corrosion of the reinforcing steel over a majority of the slab and beams. gmf
  12. gmf

    Concrete Beam to Wall Connection

    I am currently working on a parking slab replacement project in Canada. The parking slab is covered with asphalt and serves as surface parking for a hotel. Below the slab is an under ground parking garage. The slab is a one-way slab spanning approximately 20ft. between beams cast monolithicly...
  13. gmf

    NBC 2005 Parking Garage Live Load?

    We are working on the removal and replacement of an existing 8 inch thick parking garage slab at an existing hotel. The slab supports an exterior above ground parking lot (a drive through area is provided in front of the hotel for drop-off and pick-up), and is suspended over a single level...
  14. gmf

    Wood Shearwalls in Canada

    We are designing wood shear walls in British Columbia, Canada for a residential home. The building codes in B.C. require that lateral design be completed given the high seismic zone. My colleague has obtained his minimum lateral earthquake force, V using V = S(Ta)MvIeW/(RdRo) and has designed...
  15. gmf

    Effects of Wind Loading on 40'x20' Banner

    Thanks everyone for the help. This has been great. I have been able to get a udl load confidently at the top and bottom of the banner using Roark's and analyzing the banner as a simple flexible (cable) beam. Now using the udl's I have obtained at the top and bottom of the banner, I am...
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