Placing yourselves between the fire and any vent openings?
The fire is located on the 'C' side of a single story commercial building (rear) and your approach is from the 'A' side (front door entry). There is a mix of heavy gray and brown smoke coming from the 'A' side, under the roof and out of any existing openings. The smoke issuing at the 'C' side is heavy black. If you decide to make this entry/approach in the first place, under what circumstances (if any) would you cross-ventilate by making openings 'behind' your advance? (ie; venting windows on the 'A' side? adjacent to the point of entry)
What is likely to happen to an under-ventilated fire when such openings are made?
Where will the fire most likely head for?
Under what circumstances should a vent opening be made whilst firefighter's are occupying the building?
Under what circumstances should a vent opening NOT be made whilst firefighter's are occupying the building?