HomeMy WebLinkAbout280 Route 28 plan 1GENERAL NOTES
1. THESE DRAWINGS DESCRIBE STRUCTURAL MODIFICATIONS TO AN APPROXIMATE 4000-SQUARE-FOOT SECTION OF AN EXISTING APPROXIMATE 1 4,000-SQUARE- FOOT COMMERCIAL
BUILDING. THE MODIFICATIONS WILL REMOVE EXISTING FIRST -FLOOR WOOD -FRAMING AND REPLACE IT WITH CAST -IN -PLACE CONCRETE SLAB -ON -GRADE. THE MODIFICATIONS WILL
ALSO INCLUDE THE REPLACEMENT OF PORTIONS OF THE EXISTING CMU FOUNDATION WITH NEW CAST -IN -PLACE CONCRETE FOUNDATION, AND THE FILLING -IN OF THE EXISTING
CRAWLSPACE WITH STRUCTURAL FILL.
THE MODIFICATIONS ARE DESIGNED TO ACCOMMODATE STORAGE AND ASSOCIATED FORKTRUCK USE IN THE FIRST -FLOOR SPACE OF THE APPROXIMATE 4,000-SQUARE-FOOT SECTION
OF THE BUILDING.
THE MODIFICATIONS MAKE NO CHANGES TO THE WOOD -FRAMED STRUCTURE ABOVE THE FIRST FLOOR.
2. WORK SHALL SHALL CONFORM TO THE FOLLOWING GOVERNING STANDARDS:
A. THE MASSACHUSETTS STATE BUILDING CODE, NINTH EDITION, AND ALL OTHER AGENCIES HAVING JURISDICTION.
B. ACI "BUILDING CODE REQUIREMENTS FOR REINFORCED CONCRETE." (ACI 318-LATEST EDITION).
ABSENCE OF SPECIFIC ITEMS IN THESE DRAWINGS DOES NOT INFER THAT THE CONTRACTOR IS RELIEVED FROM THE REQUIREMENTS OF THESE GOVERNING STANDARDS.
3. MATERIALS AND METHODS OF CONSTRUCTION SHALL CONFORM TO THE APPROVED RULES AND STANDARDS FOR MATERIALS, TESTS, AND REQUIREMENTS OF ACCEPTED ENGINEERING
PRACTICE AS LISTED IN 780 CMR 35.00 OF THE MASSACHUSETTS STATE BUILDING CODE RESIDENTIAL EDITION.
4. NOTIFY THE ENGINEER OF ANY ARCHITECTURAL OR OTHER MODIFICATIONS THAT MAY AFFECT THIS DRAWING..
5. THE CONTRACTOR SHALL VERIFY DIMENSIONS AND CONDITIONS IN THE FIELD PRIOR TO COMMENCING WORK. ANY DISCREPANCY BETWEEN WHAT IS SHOWN ON THE DRAWINGS AND
ACTUAL FIELD CONDITIONS SHALL BE REPORTED BACK TO THE ENGINEER IN WRITING, AND SHALL BE RESOLVED BY THE ENGINEER IN WRITING, BEFORE PROCEEDING WITH ANY
WORK.
6. DESIGN LIVE LOADS:
A. FIRST -FLOOR GRAVITY LOADS: 200 PSF OR
FORK TRUCK WITH 14,000-POUND MAXIMUM TOTAL VEHICLE + CARGO WEIGHT OR
STORAGE RACKS WITH 7,500-POUND MAXIMUM REACTION PER LEG
STORAGE RACK LEGS REST ON MIN. 4"x4"x4" STEEL PADS
B. GROUND SNOW LOAD, Pg= 30 PSF
MINIMUM FLAT ROOF SNOW LOAD, Pf= 25 PSF
7. THE FOLLOWING ASSUMED SOIL PROPERTIES HAVE BEEN USED FOR THE FOOTING DESIGN.
- UNIT WEIGHT OF SOIL: 120 PCF
- SOIL BEARING CAPACITY: 1 TON/SF
- ULTIMATE FRICTION FACTOR: 0.45
- MINIMUM SUBGRADE MODULUS: 250 PCF
- SOIL DESCRIPTION: MEDIUM -FINE SAND
- IN SITU DENSITY CHARACTERISTIC: LOOSE
NOTIFY THE ENGINEER IN WRITING IF SOIL CONDITIONS DIFFERENT THAN THESE ARE ENCOUNTERED AT THE FOOTING AND SLAB LOCATIONS
SPECIAL REQUIREMENTS FOR COASTAL CONSTRUCTION
1. THE EXISTING BUILDING IS SITUATED IN A FEMA-DESIGNATED FLOOD ZONE:
ZONE DESIGNATION = AE
BASE FLOOD ELEVATION = 11.0 FEET D
DESIGN FLOOD ELEVATION WITH REFERENCE TO TOP OF FIRST FLOOR = 12.0 FEET
2. THESE DRAWINGS ASSUME THAT THE COST OF THE WORK WILL NOT EXCEED 50% OF THE MARKET VALUE OF THE EXISTING BUILDING. IF THE COST OF THE WORK EXCEEDS THI
AMOUNT, THEN THE WORK WILL TRIGGER A "SUBSTANTIAL IMPROVEMENT" AND ASSOCIATED SECTIONS OF THE BUILDING CODE AND ASCE 24 WILL APPLY.
INSULATION NOTES
RIGID INSULATION WHERE INDICATED SHALL BE 2"-THICK OWENS CORNING FOAMULAR 250 OR EQUIVALENT.
WOOD FRAMING NOTES
1. FRAMING LUMBER SHALL CONFORM TO THE LATEST EDITION OF THE AFPA "NATIONAL DESIGN SPECIFICATION FOR WOOD CONSTRUCTION", AND SUPPLEMENT "DESIGN VALUES FOR
WOOD CONSTRUCTION", LATEST EDITION. MAXIMUM MOISTURE CONTENT SHALL BE 19%.
2. PRESSURE TREATED WOOD MEMBERS USED FOR PLACEMENT AGAINST CONCRETE OR MASONRY (SILLS, PLATES, ETC.)
SHALL BE PRESSURE TREATED WITH ACQ PRESERVATIVE, OR
APPROVED EQUAL, TO MINIMUM RETENTION OF 0.6 PCF IN ACCORDANCE WITH AWPA C3
3. LUMBER SHALL BE OF THE FOLLOWING MINIMUM GRADE AND SPECIES FOR THE SPECIFIED USE, UNLESS OTHERWISE
SPECIFIED:
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LUMBER SHALL BE GRADE STAMPED BY A RECOGNIZED GRADING AGENCY AND SHALL BE SURFACE DRY.
FOR EXPOSED PRESSURE TREATED MEMBERS*
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SILL PLATES, FLOOR JOISTS & BEAMS, #1 SOUTHERN PINE:
FB = 1000 PSI, E = 1.5E6 PSI
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TIMBERS AND POSTS, #1 SOUTHERN PINE (5X5 & LARGER):
FC = 800 PSI, E = 1.4E6 PSI
4. LUMBER THAT IS SPLIT, CRACKED, NOTCHED OR OTHERWISE ALTERED OR DAMAGED SHALL NOT BE USED.
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5. WOOD PRODUCTS SHALL BE STORED IN A DRY LOCATION.
6. CONNECTORS AND FASTENERS. USED TO SECURE ACQ PRESSURE TREATED LUMBER SHALL BE STAINLESS
STEEL UNLESS OTHERWISE SPECIFIED.
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7. NAILS, FASTENERS, AND CONNECTORS EXPOSED TO THE WEATHER SHALL BE STAINLESS STEEL.
8. LAP PLATES AND SILLS AT CORNERS AND AT INTERSECTIONS OF PARTITIONS.
9. FULLY NAIL OR SCREW (AS APPLICABLE) SIMPSON METAL CONNECTORS WITH FASTENERS FOLLOWING MANUFACTURER
RECOMMENDATIONS INCLUDING BUT NOT LIMITED TO
FASTENER MATERIALS MATCHING CONNECTOR MATERIALS.
FOOTING, PIER, AND SLAB -ON -GRADE BEARING STRATA NOTES
1. FOOTINGS FOR FOUNDATION WALLS, PIERS, AND OTHER COLUMN SUPPORTS, AND CONCRETE SLABS ON GRADE, SHALL BEAR LEVEL ON UNDISTURBED OR PROOF ROLLED,
ACCEPTABLE SOILS (AS DEFINED BELOW), OR ATOP COMPACTED STRUCTURAL FILL (AS DEGINED BELOW), HAVING A MINIMUM ALLOWABLE BEARING CAPACITY OF 2,000 POUNDS PER
SQUARE FOOT.
2. ACCEPTABLE SOILS (AS NOTED ABOVE) ARE EXISTING GRANULAR FILL OR NATURAL MARINE SAND.
3. COMPACTION (AS NOTED ABOVE) IS TO 95% MODIFIED PROCTOR DENSITY.
4. STRUCTURAL FILL SHALL BE FREE OF ORGANIC, FROZEN, OR OTHER DELETERIOUS MATERIALS AND CONFORM TO THE GRADATION REQUIREMENTS BELOW. STRUCTURAL FILL SHALL
BE PLACED IN LOOSE LIFTS NOT EXCEEDING 12 INCHES THICK FOR SELF-PROPELLED VIBRATORY ROLLERS AND 8 INCHES THICK FOR VIBRATORY PLATE COMPACTORS.
SIEVE SIZE STRUCTURAL FILL (PERCENT PASSING BY WEIGHT)
4" 100
3" 70-100
2" (100) (WITHIN 12 INCHES OF THE UNDERSIDE OF FOOTINGS OR SLABS.)
�/4" 45-95
NO. 4 30-90
NO. 10 25-80
NO. 40 10-50
NO. 200 0-10
5. SUBSOIL BEARING STRATA (SOILS UPON WHICH FOOTINGS BEAR) SHALL BE FREE FROM VEGETATION, LOAM, AND ORGANIC MATERIALS. SILT, FILL, TOPSOIL, AND OTHER
UNACCEPTABLE MATERIALS UNDER FOOTING LOCATIONS SHALL BE REMOVED FROM THE SITE AND REPLACED WITH COMPACTED STRUCTURAL FILL AS DEFINED IN THESE NOTES.
SUBSOIL BEARING STRATA HAVING AN ALLOWABLE BEARING CAPACITY LOWER THAN 2,000 POUNDS PER SQUARE FOOT SHALL BE REMOVED FROM THE SITE AND REPLACED WITH
COMPACTED STRUCTURAL FILL AS DEFINED IN THESE NOTES.
REMOVE EXISTING FILL MATERIAL WHERE NECESSARY AND REPLACE WITH CLEAN COMPACTED STRUCTURAL FILL.
CONCRETE NOTES
1. CONCRETE MIXTURE, FORM -WORK, DELIVERY AND PLACEMENT SHALL CONFORM TO THE REQUIREMENTS OF ACI 301 (LATEST EDITION), UNLESS OTHERWISE NOTED.
2. CONCRETE MATERIALS SHALL BE: TYPE 1 OR 2 PORTLAND CEMENT, SAND AND GRAVEL AGGREGATES. CONCRETE SHALL BE AIR -ENTRAINED PER ACI RECOMMENDATIONS. CONCRETE COMPRESSIVE STRENGTH, (F'C) IN
28 DAYS, WHEN TESTED IN ACCORDANCE WITH ACI 318-LATEST EDITION, SHALL BE AS FOLLOWS: FOR FOOTINGS, FOUNDATION WALLS, PIERS: 4,000 PSI; FOR SLABS: 5,000 PSI
3. THE MAXIMUM CONCRETE SLUMP SHALL BE 4". CONCRETE SHALL BE AIR ENTRAINED TO 5% (+/- 1 %).
4. MIXING, TRANSPORTING, PLACING AND CURING OF CONCRETE SHALL BE DONE IN ACCORDANCE WITH THE RECOMMENDATIONS OF THE CURRENT AMERICAN CONCRETE INSTITUTE SPECIFICATIONS AND GUIDELINES.
5. REINFORCING STEEL SHALL BE NEW DEFORMED BARS CONFORMING TO ASTM A615, GRADE 60, EXCEPT WHERE NOTED. RUSTED REINFORCING BARS ARE NOT ALLOWED.
6. UNLESS OTHERWISE SHOWN ON THE DRAWINGS, REINFORCING STEEL SHALL BE PLACED TO PROVIDE THE FOLLOWING MINIMUM CONCRETE COVER:
BOTTOM OF FOOTINGS 3"
FORMED SIDES OF FOOTINGS 2"
BEAMS 2"
SLABS 1Y2" BELOW TOP SURFACE
7. SLABS -ON -GRADE HAVE NOT BEEN DESIGNED FOR BUOYANCY UPLIFT FORCES DUE TO GROUNDWATER OR FLOODING.
8. REINFORCING BARS MAY NOT BE WELDED WITHOUT APPROVAL OF THE STRUCTURAL ENGINEER.
9. REINFORCING BARS SHALL BE COLD BENT IN ACCORDANCE WITH THE PROPER RADII ESTABLISHED BY THE ACI. HEAT SHALL NOT BE APPLIED TO THE BARS TO OBTAIN BENDS.
10. CONTINUOUS REINFORCEMENT SHALL HAVE CLASS "B" SPLICES (ACI 318-LATEST EDITION, SECTION 12.15) OR SHALL BE LAPPED 40 BAR DIAMETERS MINIMUM, UNLESS NOTED OTHERWISE.
11. FOOTING REINFORCING SHALL BE CONTINUOUS AND SHALL HAVE 90-DEGREE BENDS ON EXTENSIONS AT CORNERS AND INTERSECTIONS; OR PROVIDE 2'-0" X 2'-0" CORNER BARS SIZE TO MATCH, AS SHOWN ON
"TYPICAL FOOTING AND WALL DETAILS" ON THESE DRAWINGS.
12. CHAIR BARS FOR SECURE PLACEMENT AND POSITIONING OF REINFORCING STEEL ARE TO BE PROVIDED. IN NO CASE SHALL BRICK, WOOD, OR OTHER NON -CONFORMING REINFORCING STEEL
SUPPORTS BE USED.
13. COLUMN ANCHOR BOLTS ARE TO BE FURNISHED AND INSTALLED ACCORDING TO DESIGN DETAILS. COLUMN ANCHOR BOLTS SHALL BE SET BY TEMPLATE.
14. FORMS SHALL BE OILED PRIOR THEIR THE ERECTION. REINFORCING BARS WHICH ARE COATED WITH FORM OIL OR ANY OTHER BOND BREAKING MATERIAL WILL BE REJECTED AND WILL REQUIRE REPLACEMENT AT
NO ADDITIONAL COST TO THE OWNER.
15. PLACEMENT OF CONCRETE POURS FOR FOUNDATION WALL AND FOOTINGS ARE NOT TO EXCEED 40 FEET IN ANY STRAIGHT LENGTH, AND SHALL HAVE CONTINUOUS SPECIFIED REINFORCING (40 BAR DIAMETERS
MIN.) THROUGH THE CONSTRUCTION JOINT. CONSTRUCTION JOINTS SHALL BE PLACED NO CLOSER THAN 10 FT. FROM ANY CORNER.
16. ADDITION OF WATER TO CONCRETE MIXES AT THE SITE IS NOT ALLOWED.
17. CONCRETE SHALL BE PROTECTED AGAINST FROST UNTIL PROJECT IS COMPLETED. PROVIDE PROPER CONCRETE PROTECTION (INCLUDING THE ADDITION OF HEAT IF REQUIRED) IN COLD WEATHER AND MAINTAIN
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18. CONTRACTION JOINTS IN SLABS SHALL BE PROVIDED WHERE INDICATED ON THE PLANS AND DETAILS. FOLLOW THE "TYPICAL SLAB DETAILS" ON THESE DRAWINGS.
EXPANSION JOINTS SHALL BE PROVIDED AROUND PIERS AND FOOTINGS WHERE INDICATED IN THE PLANS, DETAILS AND SECTIONS.
19. CONSTRUCTION JOINTS FOR WALLS AND FOOTINGS (MARKING THE LIMIT OF A CONCRETE POUR AGAINST WHICH A SUBSEQUENT CONCRETE POUR WILL BE PLACED) SHALL HAVE CONTINUOUS HORIZONTAL
REINFORCEMENT THROUGH THE JOINT EXTENDING AT LEAST 40 BAR -DIAMETERS PAST THE JOINT. CONSTRUCTION JOINTS SHALL BE CONSTRUCTED PER THE "TYPICAL WALL & FOOTING DETAILS" ON THESE DRAWING
CONTRACTION JOINTS FOR WALLS AND FOOTINGS SHALL BE CONSTRUCTED PER THE "TYPICAL WALL & FOOTING DETAILS" ON THESE DRAWINGS.
WALLS AND FOOTINGS SHALL HAVE EITHER A CONTRACTION JOINT OR A CONTROL JOINT EVERY 40 FEET MAXIMUM OR AS SHOWN ON THE PLANS. NEITHER TYPE OF JOINT SHALL BE LOCATED WITHIN 10 FEET OF
ANY CORNER.
CONCRETE MASONRY (C.M.U.) NOTES
1. CONCRETE BLOCK SHALL CONFORM TO ASTM C90-LATEST EDITION ("SPECIFICATION FOR LOAD BEARING CONCRETE MASONRY UNITS"), NORMAL WEIGHT.
2. UNITS SHALL BE PLACED IN RUNNING BOND PATTERN.
3 .MORTAR SHALL CONFORM TO ASTM C270 TYPES. MORTAR SHALL BE FRESHLY PREPARED AND UNIFORMLY MIXED IN THE RATIO OF 1 PART PORTLAND CEMENT, Y4 PART LIME OR HYDRATED
LIME, 3Y2 PART DAMP LOOSE SAND.
4. MASONRY WORK SHALL BE LAID IN THE PRESCRIBED MORTAR AND PROPERLY BONDED AND KEYED INTO THE ADJACENT MASONRY WORK (CORNERS) AT EVERY COURSE.
5. THE FIRST BLOCK COURSE ON FOOTING SHALL BE FILLED SOLID WITH SPECIFIED GROUT.
6. GROUT FOR FILLING CELLS WITH REBAR AND BOND BEAMS SHALL BE 3,000 PSI MINIMUM COMPRESSIVE STRENGTH AT 28 DAYS AND OF FLUID CONSISTENCY AND MIXED IN THE RATIO:
275LB 3/8"PEASTONE, 200LB SAND, 1 SACKS TYPE 2 PORTLAND CEMENT, 9 GALLONS OF WATER, AND 9 OZ "WRDA" BY WALLS.R. GRACE CO.
7. FLUID CONSISTENCY SHALL BE AS FLUID AS POSSIBLE FOR POURING WITHOUT SEGREGATION OF THE CONSTITUENT PARTS.
8. HYDRATED LIME SHALL CONFORM TO ASTM C207. QUICK LIME SHALL CONFORM TO ASTM C5.
9. AGGREGATE FOR MORTAR SHALL CONFORM TO ASTM C144. AGGREGATE FOR GROUT SHALL CONFORM TO ASTM C404.D.
10. THE USE OF ADMIXTURES IN THE GROUT OR MORTAR IS NOT PERMITTED UNLESS APPROVED BY THE ENGINEER.
11. MASONRY ACCESSORIES SHALL HAVE A CURRENT COMPLIANCE REPORT FROM THE B.O.C.A. OR I.C.B.O. AND SHALL BE SUBMITTED TO THE ENGINEER FOR APPROVAL PRIOR TO ORDERING.
12. C.M.U. WALLS TO BE REINFORCED IN ACCORDANCE WITH THE MINIMUM REINFORCING PROVISIONS OF THE 9th EDITION, MASSACHUSETTS BUILDING CODE SECTIONS 2101.0, 2104.0, & 2106.0.
HORIZONTAL REINFORCEMENT SHALL BE #9 WIRE STANDARD, CONTINUOUS TRUSS TYPE REINFORCED WITH DEFORMED SIDE WIRES AT 8" ON CENTER EXCEPT AS OTHERWISE NOTED.
USE "TEE -SPLICE" TRUSS BARS AT WALL INTERSECTIONS.
13. CELLS TO RECEIVE VERTICAL REINFORCEMENT SHALL HAVE SPECIFIED GROUT PLACED TO THE FULL HEIGHT.
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THE PROJECT INVOLVES THE REMOVAL OF EXISTING PORTIONS OF FOUNDATION AND THE CONSTRUCTION OF NEW SECTIONS OF FOUNDATION, THE TRANSFERRING OF EXISTING COLUMN LOADS ONTO NEW SUPPORT
STRUCTURES, AND THE DEMOLITION OF EXISTING FIRST -FLOOR STRUCTURES.
THE CONTRACTOR IS RESPONSIBLE FOR DESIGN AND IMPLEMENTATION OF ALL MEANS AND METHODS OF JACKING, SHORING, AND OTHER CONSIDERATIONS TO ENSURE THE CONTINUED STABILITY OF THE STRUCTURE
AND THE SAFETY OF WORKERS AND OTHER PERSONS DURING CONSTRUCTION, AS WELL AS THE TRANSFER OF BUILDING LOADS FROM EXISTING SUPPORT STRUCTURES TO NEW SUPPORT STRUCTURES.
NOTE THAT THE EXISTING FIRST -FLOOR WOOD FRAMING AND PLANKS ARE PART OF THE BUILDING'S EXISTING STRUCTURAL SYSTEM, AND THEY CONTRIBUTE NOT ONLY TO THE SUPPORT OF GRAVITY LOADS FROM THE
FIRST FLOOR, BUT ALSO TO BUILDING STABILITY IN OTHER WAYS, INCLUDING BUT NOT LIMITED TO:
- PROVIDING LATERAL SUPPORT FOR THE TOPS OF THE EXISTING FOUNDATION AND BOTTOM OF WALLS;
- PROVING LATERAL SUPPORT FOR TOPS AND BOTTOMS OF EXISTING COLUMNS AND REDUCING OVERALL BUCKLING LENGTH FOR CONTINUOUS COLUMNS.
UTILITIES AND OTHER CRAWLSPACE NOTES
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AS NOTED
1. WITHIN THE
CRAWLSPACE THERE
ARE EXISTING UTILITIES THAT MUST BE DEMOLISHED AND/OR RELOCATED. INCLUDED AMONG THE UTILITIES ARE FIRE PROTECTION PIPES AND RELATED EQUIPMENT.
IT IS THE
DESIGN BY
RESPONSIBILITY
OF THE CONTRACTOR
TO ENSURE THAT DEMOLITION AND/OR RELOCATION OF THE UTILITIES IS APPROPRIATE, ALLOWED BY STATE AND LOCAL REGULATIONS, AND CONSISTENT WITH OWNER
INTENT.
KMD
DATE
2. WITHIN THE
CRAWLSPACE THERE
ARE MISCELLANEOUS STORAGE AND WASTE ITEMS, INCLUDING BUT NOT LIMITED TO SIGNS, MACHINES, AND PUMPS. IT IS THE REASONABILITY OF THE CONTRACTOR TO
REMOVE
11/1/2021
THESE ITEMS THEN DISPOSE OF, OR RELOCATE, THEM PER DIRECTION OF THE OWNER.
DRAWN BY
KMD
3. THE STATUS
OF UNDERGROUND
UTILITIES IS NOT KNOWN. IT IS THE RESPONSIBILITY OF THE CONTRACTOR TO ENSURE THAT NO BURIED UTILITIES ARE DAMAGED, AND TO REMOVE ENCOUNTERED
ABANDONED
CHECKED BY
UTILITIES.
MHP
4. REFERENCE
NOTE 9 ON SD0001
FOR NOTES RELATED TO POTENTIAL HAZARDOUS MATERIALS.
ACTIVITY & USE LIMITATION (AULI NOTES
IT IS THE UNDERSTANDING OF COASTAL ENGINEERING CO. THAT A NOTICE OF ACTIVITY & USE LIMITATION (AUL) APPLIES TO THE PROPERTY.
PER THE COMMONWEALTH OF MASSACHUSETTS DEPARTMENT OF ENVIRONMENTAL PROTECTION SUCH A DESIGNATION IS ASSOCIATED WITH REGULATIONS
THAT RELATE TO PAST RELEASES OF CHEMICALS TO THE ENVIRONMENT. ISSUED FOR PERMIT &
IT IS THE RESPONSIBILITY OF THE CONTRACTOR TO OBTAIN ALL PERMITS REQUIRED TO PERFORM THE WORK, AND TO FOLLOW ALL RULES AND REGULATIONS
ASSOCIATED WITH THIS DESIGNATION, INCLUDING BUT NOT LIMITED TO THE REMOVAL OF CONTAMINATED SOILS IF APPLICABLE. I CONSTRUCTION
IF THE DESIGNATION RESULTS IN ANY REQUIRED INSTALLATION THAT MAY AFFECT THE STRUCTURAL DESIGNS PRESENTED IN THESE DRAWINGS,
(E.G., THE INSTALLATION OF PIPES DIRECTLY UNDER THE FOOTINGS AND/OR SLAB), CONSULT ENGINEER.
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