Platform structures and platform assemblies are provided for supporting a plurality of radio frequency (RF) antennas and the weight of one or more workers. One platform structure provided herein includes a steel radial beam extending from an RF tower and a plurality of steel arms welded to the radial beam. The platform structure also includes a first front plate having a front facing portion and an angled portion, where the front facing portion of the first front plate is welded to a first steel arm. Also included is a second front plate having a front facing portion and an angled portion, where the front facing portion of the second front plate is welded to a second steel arm. The platform structure further includes a first side plate having a side facing portion and an angled portion. The side facing portion of the first side plate is welded to a third steel arm. The platform structure also includes a second side plate having a side facing portion and an angled portion, where the side facing portion of the second side plate is welded to a fourth steel arm.