Abstract: A rotational bracket assembly suitable for securing a platform to a support at a selected angle with respect to the support may include a frame configured to be secured to the support. A rotational platform mount may be carried by the frame. The rotational platform mount may include a rotational platform mount housing. A lock disk may be disposed for rotation in the rotational platform mount housing. A locking mechanism may be carried by the rotational platform mount housing. The locking mechanism may be configurable between a lock position detachably engaging the lock disk to prevent rotation of the lock disk in the rotational platform mount housing and a release position disengaging the lock disk to facilitate rotation of the lock disk in the rotational platform mount housing. A platform support member may extend from and rotate with the lock disk. The platform support member may be configured to support the platform.