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Below is an Example of and engineered fix for a food processing plant.
This is the information our customer can expect to get from Delta Structural
Technology.
Blending Pit Beam
1. Remove all deteriorated, loose and unsound concrete.
2. Remove or clean deteriorated reinforcing.
3. Patch existing concrete with a high-strength, non-shrink mortar containing
a corrosion inhibitor. Provide a smooth surface on all exposed beam faces.
4. Clean and epoxy-inject all visible cracks.
5. Remove topping slab for 18 inches from beam.
6. Provide 3 layers of SCH-41 or SCH-41S on Bottom side of beam.
7. Continuously wrap beam with SHE-25A E Glass starting from 2 feet away
from beam at bottom of adjacent slab and continue wrap across bottom of
beam, up exposed side of beam, across top of beam, down exposed side,
and on top of exposed slab for 16 inches.
8. Replace topping slab.
Blending Pit Ceiling
1. Patch bottom of exposed slab adjacent to beam with same procedures
as described in scope of work for Soup Blending Pit Beam.
2. Provide one layer of SHE-25A glass over patched surfaces. (Consider
extending the E-glass beam wrap described above over all exposed ceiling
surfaces).
Howe Richardson Flour Shaker
1. Remove all deteriorated, loose and unsound concrete at exposed edge
and underside of slab.
2. Remove or clean deteriorated reinforcing.
3. Patch existing concrete with a high-strength, non-shrink mortar containing
a corrosion inhibitor. Provide a smooth surface on all exposed beam faces.
4. Clean and epoxy-inject all visible cracks.
5. Wrap exposed edge of lab and bottom of slab with 1 layer of SHE-25A
E-Glass. Extend wrap 2 feet from exposed edge of slabs of slab with 1
layer of SHE-25A E-Glass. Extend wrap 2 feet from exposed edge of slab.
Pit Beam
1. Remove bottom 1 or 2 courses of glazed brick from inside face of beam
2. Remove all deteriorated, loose and unsound concrete.
3. Remove or clean deteriorated reinforcing.
4. Patch existing concrete with a high-strength, non-shrink mortar containing
a corrosion inhibitor. Provide a smooth surface on all exposed beam faces.
5. Clean and epoxy-inject all visible cracks.
6. Provide 3 layers of SCH-41 or SCH-41S on Bottom side of beam.
7. Continuously wrap beam with SHE-25A E Glass starting from 2 feet away
from beam at bottom of adjacent slab and continue wrap across bottom of
beam, up exposed side of beam, and across top of beam under glazed brick.
8. Replace bottom 1 or 2 courses of glazed brick.
9. Remove all deteriorated, loose and unsound concrete on side of beam
exposed above adjacent slab.
10. Remove or clean deteriorated reinforcing on side of beam exposed above
adjacent slab.
11. Patch existing concrete on side of beam exposed above adjacent slab
with a high-strength, non-shrink mortar containing a corrosion inhibitor.
Provide a smooth surface on all exposed beam faces.
12. Clean and epoxy-inject all visible cracks on side of beam exposed
above adjacent slab.
Preparation Roof
Option 1
1. Obtain structural drawings of roof structure, including concrete strength,
reinforcing size and spacing, etc.
2. Prepare a design for externally applied SCH-41S to replace existing
reinforcing for live load capacity requirements.
3. Remove all deteriorated, loose and unsound concrete from bottom of
slab.
4. Remove or clean deteriorated reinforcing.
5. Patch existing concrete with a high-strength, non-shrink mortar containing
a corrosion inhibitor. Provide a smooth surface on all exposed slab areas.
6. Clean and epoxy-inject all visible cracks.
7. Apply the SCH-41S in 2 directions in the 4 bays that are exhibiting
cracking of the bottom surface of the roof slab. (Number of layers to
be determined from analysis and design in #2 above).
Double Doors at Warehouse
1. Patch existing cracks in CMU wall.
2. Provide 1 layer of SHE-25A E-glass over repaired crack areas.
3. Grout every other CMU cell, full height.
4. Monitor movement of foundation and wall at 3 month intervals. Depending
on results of monitoring, consider repairing foundation as described in
Option 1.
Train Wall Infill
1. Install 8 feet long C6 x 8.2 steel channels at 4 feet on center, extending
4 feet into infill area on brick side of wall around the three sides of
the infill area.
2. Anchor into non-in-filled area with Hilti hollow masonry anchors at
12 inches on center.
3. Plumb wall from CMU side.
4. Weld a continuous L5x3x3/8 LLV to the bottom flange of the existing
girder embedded in the wall to stabilize the top portion of the infill.
Stitch-weld 2 inches every 12 inches.
5. Weld a continuous L5x3x3/8 LLH to the vertical steel door frame on
the sides of the infill to stabilize the side portions of the infill.
Stitch-weld 2 inches every 12 inches.
CMU Pilaster Crack
1. Shore steel girder and raise off of bearing plate.
2. Remove existing pilaster and replace with a Steel Column
3. Provide bearing plate at top of column to match original.
4. Lower girder and connect to bearing plate.
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