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FEMA Elev Cert, Highest/Lowest Adjacent grade??

Discussion in 'General Land Surveying' started by Dave Reynolds, Sep 24, 2012.

  1. Dave Reynolds

    Dave Reynolds 5-Year Member

    Joined:
    Jul 2, 2010
    Messages:
    148
    Location:
    St. Helens, OR
    An issue has surfaced regarding the highest/lowest adjacent grade to a manufactured home with metal skirting. The ground has been excavated about 1' on the low side to allow for home placement, but there is no fill against the skirting. The undisturbed ground starts about 2' away from the skirting. The FEMA instructions say "imediately next to the building". Where is "imediately next to" in this case?
     
  2. David C. Newell RPLS LS CFM

    David C. Newell RPLS LS CFM 3-Year Member

    Joined:
    Mar 27, 2012
    Messages:
    36
    Location:
    Pasadena TX
    Licensed in:
    NY, TX
    The instructions for a LOMA elevation document state "..submit lowest adjacent grade(the lowest ground touching the structure).." have use same interpretation for EC's.
     
  3. Lamon Miller

    Lamon Miller 4-Year Member

    Joined:
    Aug 23, 2010
    Messages:
    346
    Location:
    South Louisiana
    Project the sides of the structure down until it touches the ground.
     
  4. sicilian cowboy

    sicilian cowboy 4-Year Member

    Joined:
    Sep 23, 2010
    Messages:
    1,539
    Location:
    Forest Hills, New York
    Think of it this way:


    One reason they get all the elevation information (and the info about openings) is because they are worried about the hydrostatic pressure of the flood waters against the walls of the structure.

    The only place the elevation would be relevant is ......where the structure meets the ground.
     

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