i have 3 generator sets with wet weight of 1478kg each. foundation pad is 0.2m x 9.38m x 4.215x respectively. it is installed in genset room at 3rd floor of a building with 4000psi slab density. do you have any equation for genset foundation design, when the foundation is to be installed in an existing floor slab? or how can i calculate if the genset pad is safe in that 4000 psi slab. thank you. hoping for your response