(Answered) Two building movement questions

[Labyr]

Both questions pertain to mech movement and buildings (Total Warfare p.167)

Question 1: Can a mech enter or exit a building by walking backwards? A mech can't walk backwards over a building if it means changing height but can they walk through a building backwards?

Question 2: If a mech passes through a hex of an allied mech on top of a building, can it cause a collapse? For instance: a 30 ton Javelin ends its movement standing on top of a level 1 CF 40 medium building. A 35 ton Jenner moves through the Javelin's hex but finishes its movement somewhere else so as not to violate stacking. Does the building collapse at any point?

[Xotl]

1) If there's no rule against it (and IIRC there is not), then this is legal.

2) Checking for collapse has no special timing noted with regards to movement, so yes, whenever the weight is exceeded during the movement phase, a collapse is triggered (which I think makes sense: the building has no way of knowing that it's supposed to wait for end of the Movement Phase or whatever).

[Labyr]

Makes sense, thanks!