Radnor Fire Company was dispatched for the dwelling fire in the 800 block of Maple Glen. Arriving units reported heavy fire from the rear of a large 2 story sfd and placed all hands in svc. Special calls for addl manpower from Sta-53 & 41 Delco, 23, 24, & 47 from Montco, & 2 & 3 from Chesco.