Abstract: An extendable support system having a plurality of support members and a plurality of pairs of spaced-apart side rails, each pair of which being affixed to one support member. Each of the support members move longitudinally relative to the other and include stop tabs which are configured to limit the longitudinal extension of the support system. The support members are L-shaped to add strength to the system as well as limit longitudinal retraction of the system. The extendable support system is attached to a platform by means of a pair of spaced-apart T-rails and includes extension means for increasing the angle of motion of a pivotal platform.