The exterior walls of the warehouse you noticed were heavy and solid wood. The interior .. it's hard to tell in this gloom, the warehouse not being very well lit. It looks like wood .. perhaps lighter wooden slats, and heavier support beams? Probably not enough to stand up to a tetsubo .. or an angry crab. Getting a sufficient run up to burst through could be tricky though, since the walkway is narrow. Charging up the stairs might be an option, but that staircase was rather unsteady.<br/><br/>((If you want to try bursting through a wall, it will be a strength/athletics check to do so. The TN will be lower if you use the stairs for a run up, but that will require an agility/athletics check to keep your balance first))