Seesaw development in Appalachia. 'Hickey-horse' in the coastal regions of North Carolina is consistent with other linguistic and ethnic variations." Seesaw A seesaw (also known as a teeter-totter or teeterboard) is a long, narrow board supported by a single pivot point, most commonly located at the midpoint between both ends; as one end goes up, the other goes down. Mechanically, a seesaw is a lever which, like all levers, consists of a beam and fulcrum. The most common playground design of seesaw features a board balanced in the center. A person sits on each end, and they take turns pushing their
Playground surfacing injuries, according to the American Academy of Orthopedic Surgeons. More than half of these injuries result from falls to a playground surface that can cause fractures, concussions, dislocations, and internal injuries. Recognizing these facts, many organizations, including the Consumer Product Safety Commission, have issued guidelines and standards for playground surfaces. ASTM International has issued what it calls the “ASTM Standard Specification for Impact Attenuation of Surface Systems Under and Around Playground Equipment”, which is known by its numerical designation, F1292. This standard accounts for both the deceleration of the head during impact and the length of time the head takes