Mid-Rise Buildings Panel Land & Development Conference - - PowerPoint PPT Presentation

Mid-Rise Buildings Panel Land & Development Conference

Wood-Works

Technical Director: Steven Street

Mid-Rise Combustible Construction

British Columbia Building Code (Published)

• 5 and 6 storey wood buildings
• residential (Group C) multi-family occupancies
• no expansion of total floor area beyond that permitted

(7200 m2) for 1-4 storey wood buildings

• increased level of sprinkler protection within the 5 and 6

storey buildings (NFPA 13)

Actual Code Changes Implemented: Effective April 6th, 2009

– Building Height – Article 3.2.2.45 – Building Area – Article 3.2.2.45 – Exterior Cladding Materials – Article 3.2.2.45 – Shear Walls – Article 4.1.8.10 – Building Diaphragms – Article 4.1.8.15 – Hold-Open Devices – Article 3.1.8.12 – Consideration of Structural Wood Shrinkage – Subsection 4.3.1

Provision #1- Building Height Clause 3.2.2.45.(1)(B)&(C)

• building height required under 3.2.2.45 (Group C-Residential, up to 6

storeys, sprinklered) are less than 18 meters to the uppermost floor level -top storey, (mezzanines)

Provision# 2 – Building Area

Mid-Rise Combustible Construction National Building Code of Canada (proposed changes to the NBCC 2015) NRC since 2010 has been evaluating mid-rise combustible construction Group C (residential) and Group D (business)

Mid-Rise Combustible Construction Joint task group (JTG) was formed in 2011 to review proposed code changes to NBCC and NFCC- National Fire Code of Canada and comment on research/proposals. JTG consisted of stakeholders: Fire Marshalls Fire depts Architects Engineers Code proponents CWC

Mid-Rise Combustible Construction 4 Sub task groups: Fire Protection and Safety Structural, Earthquake and Mechanical Systems Building Envelope and Environmental Separation Fire Code, Construction and Demolition

STG research and review:

• Wood-frame wall assemblies have been tested for Sound

Transmission Class (STC)

• Floor (STC)
• Shearwall assemblies
• Fire testing- resistance ratings of 5 wall assemblies
• Building envelope- wind, rain, humidity

Construction phase Note: Many of these provisions already are contained in the NFC and here in Ontario in the OHSA regulations!

Proposed measures: Improve FD access during construction phase Adequate water supply Health and safety planning- Designated smoking areas Site security –fencing / potentially CCTV