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  • 1.  Wind load

    Posted 12-17-2019 08:47 AM
    Edited by Tirza Austin 12-17-2019 08:46 AM
    If new building to be constructed very near (few meters) of existing building wall, is there especial wind load consideration on the new wall. Any reference?

    Building height around 40m.

    Ammar Fakhoury P.E., M.ASCE

  • 2.  RE: Wind load

    Posted 12-18-2019 10:44 AM
    Edited by Tirza Austin 12-18-2019 10:43 AM
    Ignore the existing building. It may not always be there.

    Glenn Boerke P.E., M.ASCE
    Smyrna TN

  • 3.  RE: Wind load

    Posted 12-19-2019 07:58 AM
    I would check
    A) without the existing building
    B) with it. With the building you might have funnel effects in the gap (e.g. entrance roofs).

    Tino Bretschneider Ph.D., P.E., S.E., M.ASCE
    Senior Engineer
    Elmwood Park IL

  • 4.  RE: Wind load

    Posted 12-19-2019 08:32 PM
    If memory serves, ASCE 7 specifically prohibits any aerodynamic shielding for wind loads since, as Glenn mentioned, the building or object providing the shielding may not always be there.

    Charles Grochala P.E., M.ASCE
    Coralville, IA

  • 5.  RE: Wind load

    Posted 12-18-2019 04:55 PM
    Check the IBC. I do not have a copy here, but as I recall, there are considerations. Ignoring the existing buildings would be conservative as long as there wasn't some type of Venturi effect.  At any rate, check the IBC to be sure.

    Stacey Morris P.E., M.ASCE
    ETI Corporation
    West Memphis AR

  • 6.  RE: Wind load

    Posted 12-19-2019 01:16 PM

    Dear Ammar,

    I agree with the previous answers, the building may be demolished in the future. You should do your calculations ignoring the building according IBC and site regulations.

    Fernando Gomez SET, S.ASCE
    General Manager
    Dallas, TX.

  • 7.  RE: Wind load

    Posted 12-19-2019 07:22 PM
    Be aware that the roof of the adjacent building (if it is lower than your building) will create a turbulence and speed up zone that will combine with your building's corner zone.  The negative pressures in this region may exceed what is in ASCE-7 due to the double discontinuity where vertical edge meets horizontal edge.

    Richard Green P.E., M.ASCE
    Mountlake Ter WA

  • 8.  RE: Wind load

    Posted 01-31-2020 05:21 PM
    Edited by Tirza Austin 01-31-2020 05:21 PM
    Dear Ammar Fakhoury
    It is best not to build a building next to the Not bracing walls.
    But if you must build it. Better check the following.
    1) Impacts of earthquake force and presentation of seismic rehabilitation method if vulnerable
    2) Effects of wind load and how to rehabilitation it if it is vulnerable
    3) Impacts of the soil on the site and its rehabilitation if it is vulnerable

    Reza Mokarramaydenlou, Ph.D., C.Eng, P.E., S.E., M.ASCE
    Structural Engineering and Seismic rehabilitation Consultant 
    Mokarramandpartners LLC