09/24/2007 Council Packet - Laserfiche WebLink

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City of Lino Lakes T 11teig PrnjPrt No 2(171172 September 24, 2007 Page 4 b. The temporary support posts supporting the clay tile and stucco veneer are not mechanically connected at the top or at the bottom of the posts. This is an unstable condition that needs to be addressed. c. The block knee wall in its current condition is not structurally adequate. As it stands right now, the knee wall would be acting as a retaining wall, relying on the footing to help provide the counter resistance needed to support any lateral soil pressure that would be applied to the wall. However, there is no reinforcement in the wall or grouted cores to provide sufficient strength and it appears the footing is only a standard 16 -inch wide concrete footing that does not have the width to provide the resistance needed to support the wall. Currently, the soil pressure pushing on the knee wall is minimal due to the void noticed behind the wall visible from the northwest corner of the building While, this helps the wall remain intact, this condition could result in additional foundation and basement slab settlement under the house along and near this wall. If the soil settles and fills in the void, the soil would push into the masonry knee wall which would result in failure of that wall, thus collapsing the temporary frame wall supporting the main floor framing as well as the temporary posts supporting the exterior veneer. d. The undermined condition of the north and south wall, at the northwest and southwest corners respectively, is not structurally stable. At these two areas, the foundation walls are cantilevering out over their respective voids created when the area was undermined for the placement of the masonry wall. These foundation walls, and the house walls, are not intended to cantilever out as noted. This has resulted in settlement of the house towards the west wall as noticed by the cracks in the north and south wall and the slope in the floor. The current condition is unstable and if this condition is not addressed, further settlement can be expected. e. The footing for the masonry knee wall was constructed such that it would be directly under the finished floor elevation of the garage addition. This placement of the footing does not provide adequate frost protection unless the garage was to be heated or rigid insulation was to be placed out from the footing to obtain some frost protection. 3. A structural review of the ICF garage walls was completed and the following items are noted: a. The construction of the walls regarding rebar placement or strength of coiicaete _could not be verified at the time of the site visit. However, there is no floor framing above these walls to provide lateral support at the top of the • • •