### Proposal: New AC3 (AR2) Chainmail Specs

Posted:

**2012-12-14**To simplify matters, I'll leave the geeky number stuff in the original post. Please refer to it for the reasoning behind the following proposal. Note that the change from chainmail as Armor Rating 2 to Armor Class 3 will automatically happen, as the new AC system goes into effect on Jan 1, 2013.

Rationale: Revise the Chainmail (AC2) specifications to accomodate Aspect Ratio (an indicator of weave strength), and add rules for riveted mail (which is inherently stronger, thus we should allow bigger rings).

Current Rule:

Proposed Rule:

Rationale: Revise the Chainmail (AC2) specifications to accomodate Aspect Ratio (an indicator of weave strength), and add rules for riveted mail (which is inherently stronger, thus we should allow bigger rings).

Current Rule:

Armor Rating 2

Chain mail must be made with links no larger than 1/2" rings of 12-gauge steel or bronze; 3/8" rings of 14gauge steel or bronze; or 1/4" rings of 16-gauge steel or bronze. Chain mail made of sturdy links that fails to meet the requirement of AR2 will be AR3, e.g. shark mail would fall into this category.

Proposed Rule:

Armor Class 3

Chainmail armor is constructed of interwoven metal rings, and the ratio of the diameter of those rings to the width of the wire used, known as aspect ratio, determines its strength. The maximum ring sizes for standard European 4-in-1 chainmail armor, both butted and riveted, are given below. Chainmail armor made of sturdy links that fails to meet the requirements of AC3, e.g. shark mail or butcher's mail, will count as AC2.

Butted Mail must have an aspect ratio of 4.8 or less, as follows:

12g rings must be no larger than 1/2" (0.5") or 12.7mm

14g rings must be no larger than 3/8" (0.375") or 9.8mm

16g rings must be no larger than 5/16" (0.312") or 7.8mm

18g rings must be no larger than 3/16" (0.188") or 5.8mm

Riveted mail must have an aspect ratio of 7.5 or less, as follows:

12g rings must be no larger than 3/4" (0.75") or 19.8mm

14g rings must be no larger than 9/16" (0.562") or 15.2mm

16g rings must be no larger than 7/16" (0.438") or 12.2mm

18g rings must be no larger than 5/16" (0.312") or 9.1mm