Depending on the type of glider, two or more people may be  required for assembly. It is important for everyone involved  to maintain focus throughout the assembly process to avoid  missed steps. Outside disturbances should also be avoided.  Once the assembly is finished, a thorough inspection of all  attach points ensures that bolts and pins were installed and  secured properly. Do not use a hammer to tap wing bolts  or other glider components in their place. The main wing  pins should slide into the socket with minimum application  of force. If the wing bolts require such force, a mechanic  should be retained to ensure that the main wing spar is not  bent or damaged. is Safety Advisory 00-1, Glider Critical Assembly Procedures,  and can be found in Appendix A of this handbook. Many manufacturers provide a critical assembly checklist  (CAC) to be completed after assembly, which is the preferred  method of ensuring a proper assembly has been completed.  When provided by the manufacturer, it is mandatory. A  positive control check (PCC) is not a CAC, but an additional  means of verification. If a CAC is provided, it must be used  as is any other checklist a manufacturer provides. A PCC is  not regulatory, but it is a good idea whether or not you just  completed the required CAC. On most gliders, the wing can be completely removed from  the fuselage area. On some motor gliders, the wing can be  folded up for ease of storage.  [Figures 6-2]  This allows the  glider to be placed in a normal size hangar. Hangars are  usually between 35 and 45 feet in width. Because most glider  wings are a minimum of 40 feet (12 meters) total length, a  larger hangar is usually desirable.  Specially designed trailers are used to transport, store, and  retrieve gliders.  [Figure 6-3]  The components of the glider  should fit snugly without being forced, be guarded against  chafing, and be well secured within the trailer. Once the  loading is completed, take a short drive, stop, and check for  rubbing or chafing of components. Ensure that any items  carried inside the trailer are secure from movement. For  example, jacks, ramps, wing stands, and ground dollies must  be secured so that these items do not damage the glider. Once the gliders wings have been folded, the glider can  easily be moved in and around the hangar area. On some  gliders, operators may elect to leave the wings attached for  quick access. This is usually the practice at larger glider  operations. These gliders can be fitted or rolled onto a small  dolly that has castering wheels. The glider’s main wheel fits  into a slot, and the entire glider can be pivoted and moved  to accommodate other gliders.  Once the glider has been completely assembled, the pilot  then inspects all critical areas to ensure all flight controls are  attached. The pilot should refer to a written checklist either  provided by the manufacturer or a commercial source that  prints glider checklists. This final check is very critical and usually takes time to  complete. Pilots should not be interrupted when they are  attempting to check the glider. The Soaring Society of America  (SSA) and one of its affiliates, the Soaring Safety Foundation  (SSF), have developed a checklist for preparing a glider, which  Figure 6-3.  Components of a glider stored and transported in a trailer. Figure 6-2.  The wings of the glider can be folded in order to conveniently store the glider. Trailering 6-3