Structural Inspection Foundations

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1 Structural Inspection Foundations 0211 Footings Concrete pad and continuous footings The concrete footings consist of continuous strip footings at the building perimeter of the following sizes: 16 wide x 8 deep at the original school building; 18 wide x 8 deep footing at the gymnasium addition; 22 wide x 8 deep at the southwest wall of the gymnasium; and 14 wide x 8 deep at gymnasium shear walls and at the connection between the gymnasium and the main school building. Spread footings varying in size from 3 x 3 x 16 deep to 7 x 7 x 20 deep at the building interior. The concrete footings were not visible for inspection, however based on the lack of settlement exhibited by the structure they appear to be in good condition. Remaining life expectancy: 10+ years. No deficiencies noted for this building system Foundation Walls Foundation walls, basement walls, and pilasters Reinforced concrete foundation walls below grade. At the original building the walls are typically 8 thick at perimeter walls extending to footings immediately beneath the basement slab. At the gymnasium addition the foundation walls vary in thickness being 6 thick at the connector between the gymnasium and the main school building and 8 thick at the perimeter of the gymnasium. At the gymnasium the foundation walls extend to footings that have bottom of footing 4 feet below exterior grade. Foundation walls in general cannot be inspected as they are below ground level. Their condition can be assumed to be good as there is little or no evidence of settlement or distress. Remaining life expectancy: 10+ years May 2005 Harborview Elementary School Condition Survey Report Page 42 of 210

2 Structural Inspection Foundations Deficiency Spalled West Gym Foundation Wall The corner of the foundation wall has spalled. Deficiency category: RR Remedy Repair spalled area with repair grout. Estimated Construction Cost: $500 May 2005 Harborview Elementary School Condition Survey Report Page 43 of 210

3 Structural Inspection Foundations 0220 Slab on Grade Standard or structural slabs, trenches, pits, and pads The building has a 4 inch thick slab on grade in the basement and in the gymnasium. Plans show that at the gymnasium reinforcement is #3 bars at 12 on center each way and at the original school building the basement slab reinforcement is 1/2 diameter bars at 18 on center each way. No expansion joints are noted on the plans except that the basement slab is not tied to foundation walls. Although the slab on grade slabs are typically covered and not capable of being inspected, slab condition is believed to be acceptable as there is little sign of distress. The gymnasium floor appears to be uneven but this could be the floor covering or some minor settlement. Remaining life expectancy: 10+ years No deficiencies noted for this building system. May 2005 Harborview Elementary School Condition Survey Report Page 44 of 210

4 Structural Inspection Floor Structure 0312 Elevated Floors Structural floor diaphragm, supporting columns, and bracing The floor construction at classrooms at the main level floor and upper level floors consists primarily of open web steel joists supporting a concrete covered, metal pan deck. The east and west exterior concrete walls and lines of reinforced concrete beams above central corridor walls support the joists. Beams are supported by reinforced concrete columns. The main floor toilet room floor above the boiler room is a structural concrete slab. The corridor floors consist of a reinforced concrete slab supported by the reinforced concrete beams on each side of the corridors. The second floor in the gymnasium addition is similar to the floor construction in the main building, except supporting beams and columns are steel. There is a concretecovered, steel deck supported by open web steel joists, which, in turn, are supported by steel beams. Either steel columns or pre cast exterior wall panels support the steel beams. Floors structure appears to be in good condition. Remaining life expectancy: 10+ years. May 2005 Harborview Elementary School Condition Survey Report Page 45 of 210

5 Structural Inspection Floor Structure Deficiency Spalled Floor above Boiler Room There is a large spalled area around pipe penetrations at the underside of the elevated floor slab above the boiler room. Deficiency category: RR Remedy Patch spalled area with grout. Estimated Construction Cost: $600 May 2005 Harborview Elementary School Condition Survey Report Page 46 of 210

6 Structural Inspection Floor Structure Deficiency Lateral Load Resisting System For the main building the lateral load resisting system consists of a concrete moment frame. Building code provisions for the design of concrete moment resisting frames has changed significantly since this structure was originally designed. The structure should be analyzed to determine if a seismic retrofit is appropriate. The gymnasium lateral load resisting system is a shear wall system, It was analyzed in 2003 and found to be relatively acceptable. Some minor framing improvements were made after that study. Deficiency category: C Remedy Perform analysis of lateral load resisting system and retrofit main building if needed. Estimated Construction Cost: $15,000 for lateral load analysis $ 300,000 for retrofit (based on new shear wall costs May 2005 Harborview Elementary School Condition Survey Report Page 47 of 210

7 Structural Inspection Floor Structure 0314 Ramps Ramp structure and railings There is an elevated ramp structure (material) at the main entry. This ramp was placed above the original stairs and floor in the 1983 renovations. The ramp condition is good. Remaining life expectancy: 10+ years. No deficiencies noted for this building system. May 2005 Harborview Elementary School Condition Survey Report Page 48 of 210

8 Structural Inspection Floor Structure 0315 Special Floors Stages, platforms, computer floors, utility distribution floors, etc. The gymnasium has a stage at the northeast corner of the gym. The stage floor consists of 1x decking supported by 2x tongue and groove decking that spans across the stud walls between the storage cabinets below. The floor framing spans approximately 45 inches. The floor surface is worn and there are locations where the floor deflects significantly. Remaining life expectancy: 5 years. Deficiency No Photo Floor is worn and deflects significantly. Deficiency category: RR Remedy Remove existing 1x surface and replace. Verify that underlying support is not damaged. If necessary add plywood over the 2x decking. Estimated Construction Cost: $5,900 May 2005 Harborview Elementary School Condition Survey Report Page 49 of 210

9 Structural Inspection Roof Structure 0322 Low Slope Roof Structural roof diaphragm, supporting columns, and bracing The roof of the school building consists of open web steel joists supporting a nominal 2 inch thick, tongue and groove timber deck at the north half of the building (original construction). At the south half (1956 addition) of the main building open web steel joists support a plywood deck. Steel beams bearing on concrete columns on each side of the central corridor and the exterior walls support the joists. The condition of the roof structure appears to be adequate. Remaining life expectancy: likely more than 15 years. The gymnasium roof is comprised of open web steel joists, with a single gable of low slope, supporting a steel deck, which supports insulation and an adhered membrane. The roof joists are supported by exterior pre cast wall panels which rest on the perimeter foundation walls. A lateral load path evaluation was performed on the gymnasium addition in 2002 and found the lateral resisting system to be acceptable with minor improvements. The condition of the roof structure appears to be adequate. Remaining life expectancy: likely more than 15 years. No deficiencies noted for this building system. May 2005 Harborview Elementary School Condition Survey Report Page 50 of 210

10 Structural Inspection Stairs 0331 Stairs Stair structure The north end, south end and central stairs are reinforced concrete. The condition of the stair structure is good except for a spall at the underside of the stairs between the gymnasium level and the main floor, at the south end. There are concrete stairs at the second level of the connector between the gymnasium and the main building (on the gymnasium addition plans this room is noted as the music art room). This same room has a timber framed egress stairway between the stage area and the storage room. Remaining life expectancy: 10+ years. May 2005 Harborview Elementary School Condition Survey Report Page 51 of 210

11 Structural Inspection Stairs Deficiency Spalled Concrete Under South Stairs Deficiency category: RR Remedy Grout spalled area. Estimated construction cost: $600 May 2005 Harborview Elementary School Condition Survey Report Page 52 of 210

12 Structural Inspection Stairs 0333 Ladders Ship s ladders and other fixed ladders There are the following fixed ladders: 1) There is an interior fixed ladder to access the roof in a second floor communication room, 2) There is an exterior ladder from the main building high roof to the lower roof at the connection to the gymnasium. The condition of the interior ladder is good. The exterior ladder is rusted, but sound. Remaining life expectancy: greater than 15 years No deficiencies noted for this building system.. May 2005 Harborview Elementary School Condition Survey Report Page 53 of 210

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