But how would they have been able to do it? Considering how rapidly BR6 and even BR5 flooded, would the carpenters and guarantee team have had the time to gather the necessary equipment and find the damaged areas, let alone attempt to repair them?
I believe Thomas Andrews' prediction of how long the Titanic had left was based on the flooding pattern in relation to time elapsed rather than actual physical inspection of the damage itself.
11:40 collision
11:45 Andrews finds out about the collision, then starts to check each of forward compartments. Perhaps collaborates with Carpenter to cover more compartments instead of covering same task.
12:00 Suspect first lower 5 compartments were breached. 6th non-critically. All BR6 men know that compartment is breached even if it's in darkness.
12:05 gather team. Ask a few to mark out the line to be closed off. The rest to wait at the carpentry store assuming it to be locked
12:10 Ships Carpenter to advise best place to gather the pieces; eg, carpentry store, planks, solid doors or tables, beds, furniture.
12:15 convince Captain the work must go ahead. He orders Labourers (BR6 men?) to help carry wood & tools to location, porters to unlock appropriate cabins for access. Might need 1 officer and senior staff in first half hour to supervise this to avoid obstruction, if scavenging in the cabins.
12:20 start to nail in 2x2 frame and supports on floor for diagonal struts. This is all the essential work on the floor of the corridors which is swamped around this time. All nailing is above floor height from that point.
12:25 Once that is done, the planks or doors, can be sawed to length and placed in front of the frame across the corridors. This is built up, mainly over the following hour as the level rises.
So we have 11 workers, excluding Labourers, across 75ft (about 25ft is the casing from memory) so that's about one worker per 7ft, to either build the wall or support the nearest cabin wall above the WTB which extends down through F deck to between BR5 & BR6.