Max height of a crib tower is based on number of contact points, per USAR field operation guide. One contact point allows a max height of 1 x your footprint (length of cribbing minus offset). Two contact points allows a max height of 1.5 x your footprint. Four contact points (there arent situation where you have three contact points) allows for 2 x your footprint. Four contact points would be a lifting situation with airbags.
Do you remember the comment, still down below, saying, "Terry Beynon 3 months ago I believe the math is incorrect on the 3x3 cribbing load capacity." Well, You probably fixed it with annotations, now, youtube removed that feature. I just wanted to tell you, they screwed the annotation system.
