i have a 10 story building and the top floor get bit on side cz of the
earthquake i was worried wht happen the whole collapse tht is y i cant risk
for anyone to fullfill this requiremnt and fix the floor to its rite place.
but amoung many contractor i choose this http://www.saundersseismic.com
earthquake retrofitting bay area and wen they started working i felt so
lucky tht i choosen the rite one for my building. so i recomend you to take
help from them they are good from every perspective.