Fire egress - BCA alternative solution option?

Please give us any insight you may have. Trying to search on goggles but didn't have much informations.

With our development, in the basement carpark, according to BCA we would need two fire egress. However due to the tight area it's best if we only have one. Length of basement is 34m. They're 4 private stair access to each of the 4 townhouse. There's one fire egress. There's driveway down to basement.

Question is with the alternative solution, can we have one egress plus the stair up to each individual townhouse be sufficient. What other things world be require to meet BCA alternative standard? would it require additional sprinkler system other sysystem which would have ongoing maintenance cost? Would like to know to see if it's worth it to have just one egress and get BCA consultant report.

Any comment are much appreciated

 

Plans would be helpful

 

BCA tells you that 30 m is the maximum path of travel for a single exit.

Move your exit.

 

How do you move the exit?

Build a 4 m tunnel so travel distances comply.

 

30m to a sole exit is the standard in this situation.

the driveway down to the basement should also one pedestrian exit, however - so now you're down to 20m from any exit as long as you have one pedestrian stairwell and one access down.

however, there are conditions re the driveway exit - for example, one condition is that it must have a manual gate exit, not electric only. If the driveway down can only accommodate the width of a car then you're in trouble too - it should be able to demonstrate unobstructed travel for a pedestrian.