NFPA 1971 Design and Performance Requirements for Footwear

Footwear Design Requirements

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Performance Requirements NFPA 1971, 2013 Edition
Structural and Proximity Firefighting
Components Must consist of sole with heel; upper with lining; puncture-resistant device; insole; ladder shank or whole sole equivalent; impact and compression-resistant toecap
Height Minimum of 250mm (10"); removable insoles shall not be removed; thermal, physical, and moisture protection continuous to within 2'' of footwear top with exception of 12'' around pull up holes that penetrate footwear from outside to inside; height of thermal physical and moisture protection no less than 10'' when measured as described
Width of Heel Footwear heel width shall be equal or > than width of sole at intersection of heel breast and sole bottom, excluding any calendar roll where present
Footwear Heel Breast Heel breast not less than 13mm (12") or not more than 25mm (1"); angle not less than 90° or more than

134°; edges must measure 13mm (12") minimum from upper at any point

Puncture-Resistant Device Must cover maximum area of insole as specified in CSA Z195
Thread Inherently flame resistant
Hardware and External Fittings Free of rough spots; metal parts shall not penetrate from outside into liner or insole; no metal shall be used in construction or attachment of sole with heel to puncture-resistant device, insole, or upper
Sizing Available in men's 5–16 and women's 5–10, including half sizes and a minimum width of three widths;
Full and half sizes accomplished by individual and unique men's and women's lasts; dual sizing to cover both men and women not permitted
Performance Requirements Specified in ASTM F 2413 ASTM F 2413 Performance Requirements for Protective (Safety) Toe Caps Footwear, 2011 edition is referenced in several test requirements; it is used for impact, compression, and puncture resistance with exception that flex resistance to cracking be evaluated at 1,000,000 cycles

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Footgear Performance Requirements

Download as a pdf | See Design Requirements

Performance Requirements NFPA 1971, 2013 Edition
Structural and Proximity Firefighting
Optional Requirements CBRN footwear
Abrasion Resistance Soles and heels shall be tested for resistance to abrasion and the relative volume loss shall not be greater than 200 mm3 (change from ASTM test method to ISO)
Conductive Heat Resistance (Test 2) Temperature of insole surface in contact with feet not to exceed 44°C (111°F)
Cut Resistance TIA upheld; footwear uppers—distance of blade travel < 20mm (0.8")
Electrical Insulation No current leakage in excess of 3.0 mA
Eyelet and Stud Post Attachment Detachment strength of 294N (66 lbf.)
Flame Resistance Whole boot flame; requirement is maximum afterflame of 5 seconds; shall not melt or drip; and shall not exhibit any burn-through
Flex Cracking Flex cracking resistance test replaced with ASTM F 2413 for impact, compression, and puncture resistance with exception that flex resistance to cracking be evaluated at 1,000,000 cycles
Heat and Thermal Resistance No melting, separating, or ignition; no water penetration and all components must remain functional
Impact and Compression Tests Current test eliminated; new test ASTM F 2413 for impact, compression, and puncture resistance
Label Durability Legibility test after abrasion and heat
Ladder Shank Bend Resistance Ladder shanks or whole sole equivalents shall not deflect more than 6 mm (1/4")
Liquid Penetration Upper material composite and seams; one hour duration; no penetration
Metal Hardware and Parts All metal tested for corrosion resistance
Overall Liquid Integrity Test Errata to eliminate overall liquid integrity test upheld; part of heat and thermal testing
Puncture Resistance Footwear uppers shall not puncture under applied force of 60 N (13 lbf.); new test ASTM F 1342
Radiant Heat Resistance (Thermal insulation — Structural only) Temperature of upper surface in contact with skin not to exceed

44°C (111°F)

Radiant Heat (Proximity) Radiant reflective value eliminated; New test "Radiant Heat Resistance Test 2," with temperature of upper lining surface in contact with skin not to exceed 44°C (111°F)
Conductive Heat (Thermal insulation — Structural only) Second-degree burn time minimum 10 seconds; time to pain minimum 6 seconds
Conductive Heat (Thermal insulation — Proximity only) Temperature of upper lining surface in contact with skin not to reach 44°C (111°F) in 10 minutes or less
Slip Resistance New test method whereby footwear shall be tested for slip resistance and shall have a coefficient of friction of 0.40 or greater
Thread Shall not melt below 260°C (500°F)
TPP No requirement
Viral Penetration Footwear upper material composites and seams

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