“Common Structural Deficiencies/Remedies In Part 9 ... · PDF file“Common...
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“Common Structural Deficiencies/Remedies In Part 9 Residential Construction”
From: Mike Baldinelli, P.Eng, MESc, Principal
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PRESENTATION TOPICS
Strik, Baldinelli and Associates• Who Are We?
Ontario Building Code• Part 9• Part 4• Engineers Role
Common Structural Deficiencies and Remedies
Our “beefs” with the industry
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STRIK, BALDINELLI & ASSOCIATES
Principals: Mike Baldinelli, P.Eng and Aaron Strik, P.Eng
Offices in London and Cambridge
2006 & 2008, 20O9 Supplier of the Year– London Home Builders Association (LHBA)
2010 –KWRHB-Supplier of the Year
2010 Finalist-London Chamber OF Commerce- Small Business Category
President of the London Home Builders 2010-2011
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STRIK, BALDINELLI & ASSOCIATES
STAFFING: 14 Engineers and Designers
Fully Certified BCIN Firm Large/Complex Buildings, Small Buildings and
House
Primary Focus:
Structural Engineering Focusing on Residential and Commercial Buildings with a Specialty on Large Multi-Level Wood Buildings up to 4 levels.
Last year we engineered over 1800 residences across Ontario & 6 large wood structures (30-50 thousand sq ft)
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ONTARIO BUILDING CODE
PART 9 “HOUSING AND SMALL BUILDINGS”
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ONTARIO BUILDING CODE
PART 4 “STRUCTURAL DESIGN”
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ONTARIO BUILDING CODE
PART 9 of OBC:
Provides charts, tables and basic guidelines for the design of Part 9 type structures. These items can be specified by A Certified BCIN Designer.
Examples:
Tall Stud Wall Chart (now in 2006 code)Steel Beam and Wood Lintel SizesStrip/Pad Footing Sizes (limited)Brick/Wood Lintel Designs (limited)ICF type walls (now in 2006 code)
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Part 9 Building byDefinition
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Part 9 OBC Steel BeamChart
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Engineers Role
We work primarily for the Builder, Owner or Residential Designer.
We provide information in 3 main forms:
Stamped drawings for specific Part 4 Items Stamped letter/details for specific Part 4
Items Site Inspections upon request
Engineer requests differ from city to city,Currently there is no “standard”, the samehouse in one city may not require engineeringIn another (example)
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9’-3” span
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COMMON STRUCTURAL DEFICIENCES/REMEDIES
Cantilever floor over brick Tall Basement Walls Half Wall Guards Laterally unsupported foundation walls Reinforced oversized concrete windows Large brick lintel supports Rolled brick angles Steel Beam to Beam connections Beams supporting brick Suspended Concrete Slabs (now in code) Box Beam at Tall Wall @ stairs Underpinning of Ex. Walls Lot Specific Engineering Seals or Letters
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Residential Design Check List
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CantileveredFloor overBrick
OBC Code Ref:
9.23.9.9
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Tall BasementWall
OBC Code Ref:
9.15.4Table 9.15.4.2.A
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Tall BasementWall
OBC Code Ref:
9.15.4Table 9.15.4.2.A
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Half WallGuard OBC SB-7
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Interior HalfWall Guard
OBC Code Ref:
SB-7ID-1
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FoundationWall- LaterallySupported
OBC Code Ref:
9.15.4Table 9.15.4.2.A
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LaterallyUnsupportedWall
OBC Code Ref:
9.15.4Table 9.15.4.2.A
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LaterallyUnsupportedWall
OBC Code Ref:
9.15.4Table 9.15.4.2.A
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OversizedBasement Window
OBC Code Ref:
9.15.4.2
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Garage BrickLintel
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Rolled BrickArches
OBC Code Ref:
9.20.5
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Steel BeamTo Beam Connections
OBC Code Ref:
No code ref
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Suspended Concrete Slab
OBC Code Ref: 9.40
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Non-Continuous Tall Wall(at stairs)
OBC Code Ref:
9.23.10Table 9.23.10.1Table A-30-31
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UnderpinningOf ExistingBasement Walls
OBC Code Ref:
No code ref
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Lot Specific Engineering
In our opinion, each and every house should have lot specific engineering, regardless if it’s the same model or house type
WHY????
Professional Engineers of Ontario Require It
Engineers Liability won’t cover Issues if They arise
Site Conditions ChangeLot GradingTruss Layout Can Change Changes to Drawings without us KnowingSnow Loading (different from city to city)
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THE ULTIMATE REMEDY “PROFESSIONAL ENGINEER REVIEW”
Safe, Reliable Dwelling
Transfer of Liability from City, Municipality and Owner to Engineer
Marketing Advantages-Well Engineered House
Costs can be built into project, average engineering costs are 0.1-0.2% of house construction cost.
A Reality for the future of Residential Construction
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“Common Structural Deficiencies/Remedies In Part 9 Residential Construction”
From: Mike Baldinelli, P.Eng, MESc, Principal