“Common Structural Deficiencies/Remedies In Part 9 Residential Construction”

From: Mike Baldinelli, P.Eng, MESc, Principal

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

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

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)

ONTARIO BUILDING CODE

PART 9 “HOUSING AND SMALL BUILDINGS”

ONTARIO BUILDING CODE

PART 4 “STRUCTURAL DESIGN”

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)

Part 9 Building byDefinition

Part 9 OBC Steel BeamChart

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)

9’-3” span

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

Residential Design Check List

CantileveredFloor overBrick

OBC Code Ref:

9.23.9.9

Tall BasementWall

OBC Code Ref:

9.15.4Table 9.15.4.2.A

Tall BasementWall

OBC Code Ref:

9.15.4Table 9.15.4.2.A

Half WallGuard OBC SB-7

Interior HalfWall Guard

OBC Code Ref:

SB-7ID-1

FoundationWall- LaterallySupported

OBC Code Ref:

9.15.4Table 9.15.4.2.A

LaterallyUnsupportedWall

OBC Code Ref:

9.15.4Table 9.15.4.2.A

LaterallyUnsupportedWall

OBC Code Ref:

9.15.4Table 9.15.4.2.A

OversizedBasement Window

OBC Code Ref:

9.15.4.2

Garage BrickLintel

Rolled BrickArches

OBC Code Ref:

9.20.5

Steel BeamTo Beam Connections

OBC Code Ref:

No code ref

Suspended Concrete Slab

OBC Code Ref: 9.40

Non-Continuous Tall Wall(at stairs)

OBC Code Ref:

9.23.10Table 9.23.10.1Table A-30-31

UnderpinningOf ExistingBasement Walls

OBC Code Ref:

No code ref

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)

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

“Common Structural Deficiencies/Remedies In Part 9 Residential Construction”

From: Mike Baldinelli, P.Eng, MESc, Principal