part of the shoe). "0" means there is none. "1" means that there is, and it resists an impact of 125 joules (22.7 kg object falling from 56 cm above). "2" means that it resists an impact of 90 joules. The second code indicates whether the shoe has soles that protect the arches of the feet from punctures. "P" means it does. "O" means it doesn't. The third code indicates whether the shoe has a metatarsus protection against shocks and collisions. "M" means it does. "O" doesn't. The fourth code indicates the shoe's electrical properties. "E" means it resists electrical shocks. "S" means it disperses static electrical. "C" means it conducts electricity. This last code is found only on shoes that protect the foot from chainsaws, i.e. chainsaw boots. "X" it does, "O" does not. United States In the United States, the most common standards used by employers for protective footwear are ASTM International standards F2412-18a (Standard Test Methods for Foot Protection) and ASTM F2413-18 (Standard Specification for Performance Requirements for Foot Protection). OSHA previously required compliance of ANSI Z41.1-1991, "American National Standard for Personal Protection-Protective Footwear," if purchased after July 5, 1994, or ANSI standard "USA Standard for Men's Safety-Toe Footwear," Z41.1-1967, if purchased before that date. As of March 1, 2005, ANSI Z41 has been replaced by ASTM F2412 and ASTM F2413 ASTM certified footwear must include a label that indicates which safety standards that particular footwear meets. The various safety standards include: I - Impact C - Compression Mt - Metatarsal Cd - Conductive EH - Electrical Hazard SD - Static Dissipating PR - Puncture Resistant Oceania Australia: AS 2210.3:2019 Use as a weapon Steel-toe boots have been used in assaults, such as the attack on Josie Lou Ratley, a Florida teenager. Nightclubs and other entertainment venues frequently include a "no steel toecaps" rule as part of their dress code to mitigate the possibility of serious injury to other patrons if the wearer becomes violent. Use of bovver boots in football hooliganism was countered by warnings to fans that they would have to remove such boots in order to attend football matches. See also Chainsaw safety clothing Personal protective equipment Combat boot Rigger boot Safety engineering Toe box References Shoes Boots Safety clothing Footwear