investment for development. You are unlikely to gain access under
another's building to allow land improvements.
I understand that the steel corkscrews have a shorter life than those
systems that encase the tie rod in concrete. Maybe a permanent electric
charge could reduce the "chance" of corrosion.
In SF, I end up using opposing retaining walls with floors in
compression. I prefer concrete on metal deck floors but wood systems can
be considered. The problem with wood floors is that one edge is usually
without a retaining wall and so high shear forces are developed in the
diaphragm to transfer to the sides with RWs
It is nearly impossible to not have retaining wall forces transfer into
floors because the settling lateral deflections of a 14 foot RW. I see
that the new Simpson has a solution for the new code requirement of
extra connections for the wood sill to the top of a RW.
SF has expansive clays cantilever systems will move.
A crack survey of neighboring properties will limit the cost of
repairing cracking to just new cracks. This is a process where all
evidence of movement and cracking is measured and photographed and
reported with the fact that every wall, floor and foundation length was
inspected and that no evidence was missed. If the neighbor refuses entry
for a crack survey the refusal can be used as evidence of a hostile
neighbor.
David Merrick, SE
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