They are also known as the black truss markings. They provide a quick visual for the tape user and speed up the measuring process. Originally, 19.2 inches was used in metric layouts. Dividing 5 into 96 inches (8 feet) gives 19.2 inches, which yields five trusses per sheet. The black arrow in the photo to the right points directly at the black diamond located on 19.2. The red stud markings every 16 inches allow for a standard layout of six studs per 8-foot (96) section.
1 Minors under 18 must be accompanied by an adult at all times in the range and store. 2  You must be 21 years old to shoot a handgun & 18 years old to shoot a long gun without being accompanied by a parent or legal guardian.
Report Abuse. Your old enough to go to the range. However, I dont know if you have to be 21 to rent or not. To find a range go to Yahoo Local and search for shooting ranges near your area.If they have a website look it over to see if they rent, if not give em a call.ome ranges require you to use their own ammo, but I suspect it is going to be easiest for you to buy gun range ammo anyways. As above, they cannot sell handgun ammo to a minor. Maybe bringing along a 21 year old would be easiest. where to go http://bizdirectory.shootingtimes.com/st...