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  • Sample of a storm damage report


    Storm Damage Report

    TABLE OF CONTENTS

    I. Introduction

    II. Background & History

    III. Wind Loads

    IV. Wall Diaphragms

    V. Repairs

    VI. Summary

    I. Introduction

    The site was inspected by Tom Price, a licensed professional engineer. The inspection
    lasted approximately 1/2 hour. Also present were representatives of the insurance
    company.


    II. Background & History

    The home is a one storey wood framed structure on a crawl space, with a main gable ridge
    axis running approximately north-south. two hip roofed extensions extend to the east and
    to the west. It is built with materials, structural systems, and utilities very common
    for this type of home.

    A storm on the night of 5-18-97 created wind load conditions severe enough to cause sig-
    nificant damage to the property. The extension to the west had its roof lifted off in the
    storm, causing structural damage to the entire extension.


    III. Wind loads

    Wind loads create lateral and uplift forces on structures. A wood framed structure of this
    type achieves its lateral load resisting capability primarily from diaphragm action of the
    roof, wall, and floor sheathing, and diagonal bracing if present. The loads induced on the
    house have caused distortion of various diaphragm surfaces. Only careful measuring with
    appropriate measuring tools can tell just how out of plumb, level and square the house
    currently is.


    IV. Wall diaphragms

    There are numerous locations where the wall to ceiling drywall joint has failed longitud-
    inally. This is due to large lateral forces occurring in the plane of the wall. In walls
    that show visible distress to the drywall itself, the taped joints, and/or the fasteners,
    it must be assumed that the drywall is no longer acting as a rigid diaphragm, and must be
    replaced. It also is likely that the wall has been racked out of its original position.
    This causes doorways to change shape, making the door difficult or impossible to close.


    V. Repairs

    All walls and ceilings should be checked for damage to drywall. Any distress of fasteners
    and taped joints, or loosening of drywall boaDrs from the studs/ceiling framers is cause to
    remove wall boaDrs, true up all framing, and replace wall boaDrs. Framing members should
    be thoroughly checked for damage.

    Even if framing members are deemed to be in usable condition, all wall, floor, and roof
    areas must be brought back into a plumb and square condition prior to installation of new
    sheathing materials. Proper measuring devices such as transits, levels, steel measuring
    tapes, and others must be utilized to determine plumb, level, and squareness of the various
    diaphragm surfaces of the house.

    Where framing members have clearly been damaged, such as west extension, replacement of
    materials is necessary. The west extension area likely needs to be completely re-framed,
    though re-use of undamaged framing members and undamaged exterior sheathing is acceptable.
    The anchorage of the west extension to the foundation must be checked and repaired to code
    requirements. Proper bearing and anchorage to foundation must be assured.

    Any existing materials re-used In the reconstruction must be inspected carefully for damage.
    If there is any doubt about a structural member, it should be replaced.

    Any wall, floor, or roof assemblages being considered for re-use must be thoroughly
    inspected and brought into tolerance for plumb, level, and squareness.


    Vl. Summary:

    - The west extension of the house received significant damage, and will likely require a
    complete rebuild. Re-use of undamaged framing members and exterior sheathing may be
    considered.

    - The entire home needs to have all walls, floors, and ceilings checked for plumb, level
    and squareness, as well as distress to sheathing and fasteners. Damaged areas should have
    sheathing removed, framing members trued up and checked for damage, and sheathing
    replaced.



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Structural Solutions LLC
1200 Troon Ct. SE
Grand Rapids, MI 49546
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