Abstract: An athletic field is constructed using side-by-side conjoined layers of resilient synthetic material placed over a drain blanket and extending to a peripheral trench drain. The primary material construction is a rollable layer approximately 4 feet wide by 200 feet long comprising a dimpled polyethylene core material with bonded top and bottom thin, flexible geotechnic fabric layers. A flange and flap system along one edge receives the opposite edge of the joining strip to bond the laterally adjoining layers together in a shingling or tiered manner to promote drainage and to keep water out of the resilient pliable structure. The top surface is overlaid with artificial turf.

Abstract: An athletic field is constructed using side-by-side conjoined layers of resilient synthetic material placed over a drain blanket and extending to a peripheral trench drain. The primary material construction is a rollable layer approximately 4 feet wide by 200 feet long comprising a dimpled polyethylene core material with bonded top and bottom thin, flexible geotechnic fabric layers. A flange and flap system along one edge receives the opposite edge of the joining strip to bond the laterally adjoining layers together in a shingling or tiered manner to promote drainage and to keep water out of the resilient pliable structure.

Abstract: An athletic field is constructed using side-by-side conjoined layers of resilient synthetic material placed over a drain blanket and extending to a peripheral trench drain. The primary material construction is a rollable layer approximately 4 feet wide by 200 feet long comprising a dimpled polyethylene core material with bonded top and bottom thin, flexible geotechnic fabric layers. A flange and flap system along one edge receives the opposite edge of the joining strip to bond the laterally adjoining layers together in a shingling or tiered manner to promote drainage and to keep water out of the resilient pliable structure. The top surface is overlaid with artificial turf.

Abstract: A recreational play area meeting a fall height requirement and being constructed essentially of one or more layers of shock absorbing synthetic material such as dimpled polystyrene, running to a perimeter structure consisting of nailer boards and collector drain. The shock absorbing layer is overlaid with polyethylene synthetic turf filled with a sand/rubber mixture for added shock attenuation.

Abstract: An athletic field is constructed using side-by-side conjoined layers of resilient synthetic material placed over a drain blanket and extending to a peripheral trench drain. The primary material construction is a reliable layer approximately 4 feet wide by 200 feet long comprising a dimpled polyethylene core material with bonded top and bottom thin, flexible geotechnic fabric layers. A flange and flap system along one edge receives the opposite edge of the joining strip to bond the laterally adjoining layers together in a shingling or tiered manner to promote drainage and to keep water out of the resilient pliable structure.

Abstract: An athletic field lighting system, wherein fixtures are provided in clusters. Each cluster can be turned, on and set to a nominal output level. Thereafter, individual fixture output intensity levels are adjusted by means of feedback loops containing a photosensor mounted in the back of the reflector of each fixture and a pole-mounted logic center which compares commanded and actual output intensities and produces an error signal capable of producing small increments of adjustment by way of dimmer packs associated with individual fixtures. A short, range radio link is provided between an athletic field command center and each of the individual pole-mounted logic systems. A remote link between, a remote control center and the field located control center may be provided as desired.

Abstract: A playground structural member characterized by its economy of manufacture, durability and colorfastness consisting of an elongated steel tube core encapsulated within an envelope formed of recycled synthetic plastic, preferably of the polyethylene type. The upper end of the structural member includes a bulbous head, and the lower length is of a cylindrical configuration adapted to receive brackets having attachment tabs whereby the structural members may function as supporting columns for playground apparatus.

Abstract: A pole mounted lighting system particularly suitable for lighting athletic fields wherein a lamp supporting frame is mounted adjacent the upper end of a supporting pole. A vertically disposed column is attached to the frame at its central region and includes a cap engaging the pole upper end whereby, during assembly, placing the cap upon the pole upper end permits the frame to be initially positioned and supported upon the pole and permanent pole clamping members are later used to permanently clamp the frame and column to the pole.