A post anchor is provided for securing a post within a poured concrete slab. The post anchor comprises a socket having a first cavity sized to receive the post therein. A jacket member is adapted to mount over at least a portion of the socket. At least one tensile member is mounted to, and extending from, the jacket member. The jacket and tensile members function to reinforce the socket and to distribute any forces exerted upon the post anchor further into the surrounding concrete. The socket may be provided in a variety of heights, to allow the post anchor to be easily adapted to a variety of slab depths.