Whether gang forms are assembled in place or on the ground depends on the job. If space permits and the job has not progressed to a point where forms can be set in place, they can be made up and stacked on the ground. Walers, strongbacks, and necessary accessories can be secured to the gangs prior to use. On other jobs the gangs can often be erected right in position for the first concrete placement. This saves working space and time as it puts the forms to work promptly. Working space on the ground is a real asset for cleaning and oiling the gangs, especially if they are very large. Gangs can be leaned against a sturdy object or stood vertically in a temporary rack built for the purpose. Such a rack works well in small, tight working quarters. If workmen can reach over the entire gang, it can be reset before it is cleaned and reoiled. Attachment of all the foregoing equipment is usually independent of tie hardware and tie locations. As in all formwork, a good tying operation is a key to the success of any job. It is important to use ties that are produced by the same manufacturer who made the forms. The reason is that the forms and ties are designed together to provide safe working loads. If substitutes are used and if ties become overloaded failures can occur, such as a breakout of the formwork, resulting in added expense. Ties are usually supplied with printed information regarding loads and safety factors. These should be referred to for all uses. In tying and using gangs one method is to erect or set the gang on one side, insert the ties and then hand set the opposing forms between the ties. It is often more difficult to gang both sides because the ties have to be threaded through and it may be hard to locate the opposing tie hole. On low walls it may be possible to locate the hole by directing the ties from above. On thick walls, a workman may be able to work between the forms and direct the ties.