How can we get access to terrace in a society

In Co-operative Housing Society at Thane. Body members including Chairman and Secretary are denying the terrace access to other society member by stating that as per rules and under the shield of to avoid any unwelcome scenario like suicide. They are also not allowing the access of refugee area to others, though they are having their regular monthly meeting including AGM also in refugee area. It this possible even though by passing resolution in AGM and in Body meeting?However members are not accessing the terrace for They are visiting the terrace to observe if there is delay in water supply