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.
Safety & Age Restrictions BB guns use air and spring power and are intended for general target practice. They use 6mm plastic bb bullets and are totally harmless providing Safety Information is observed. You must be at least 18 years old to purchase a BB gun.All orders are only accepted on the condition customers have read our Terms and Conditions before purchasing. The Law Minimum age to purchase a BB gun is 18 years. An adult must supervise persons 14 to 18 years of age.No gun should be carried in a public place unless in transit when it should be unloaded and placed in a bag. Guns must not be concealed on one's person, or pointed or fired at another human or animal.ll orders are only accepted on the condition customers have read our Terms and Conditions before purchasing. The Law Minimum age to purchase a BB gun is 18 years. An adult must supervise persons 14 to 18 years of age.