Test 5

Completed building scenario: Open office floor plan

Test structure prior to start of fire testing in open office space on the full first storey with office fuel load.

Participants in front of the test structure prior to start of fire testing.

Fire started in bay #1 (left side of compartment), using wood crib ignition source. (Approximate time after ignition: 4:30 minutes)

Fire starting to spread along the ceiling into bay #2 (middle bay), and office fuel load within the compartment is starting to ignite. (Approximate time after ignition: 5:30 minutes)

Office fuel load in bays #1 & #2 starting to ignite with bay #3 (right front bay) starting to be exposed to the fire. Some exterior flaming can be seen coming out of the windows. (Approximate time after ignition: 6:30 minutes)

Flashover has occurred within the compartment, causing ignition of all combustible contents. All 4 bays are involved in the fire. (Approximate time after ignition: 7 minutes)

Flashover has occurred within the compartment, causing ignition of all combustible contents. All 4 bays are involved in the fire. (Approximate time after ignition: 7 minutes)

The fully developed fire burning in all 4 bays, all contents within the compartment are involved in the fire. (Approximate time after ignition: 7:30 minutes)

Fire is dying down in bays #3 & #4, returning to the point of origin in bay #1. Visual of amount of heat during the peak of the temperature during the test can be seen by the melted/distorted cones at different distances. (Approximate time after ignition: 15 minutes)

Significant fire decay with little to no visual flaming on any mass timber elements as the office fuel load has been consumed. Remaining fuel contents flaming on the floor continuing to create minor smoke and heat. (Approximate time after ignition: 18 minutes)

Smouldering remains of fuel load on floor. Visual of the charring on the mass timber shaft wall. (Approximate time after ignition: 60 minutes)

Visual of charred mass timber ceiling, beams, columns, and shaft wall that protects the unburned wood underneath during the fire. (Approximate time after ignition: 60 minutes)

Test structure after fire testing, no flaming left. No firefighter intervention or sprinklers were used during the 4-hour test. (Approximate time after ignition: 240 minutes)