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We installed a Permentry precast concrete stair, with a Bilco door, and
a 3/0 x 6/8 insulated six panel door at the base of the stair. In the
photos, you can see that we build a temporary road with our Trak-Mats so
that we do not damage your yard. This foundation was constructed with
cinder block, so we install 10″ x 10″ x 1/4″ thick steel plates on the
Permentry bolts to distribute the load over the cinder block.