Specifications include, but are not limited to: PRODUCT TYPE: Structural firefighting helmet. PRODUCT MODEL(S): MSA Cairns 660D Metro Defender Series PURPOSE: To supply a uniform, standard product specification for a fiberglass composite structural fire helmet. SCOPE: The scope of this product specification encompasses the performance criteria, design, construction and materials deemed necessary for helmets utilized for firefighting. PERFORMANCE CRITERIA/STANDARDS: The fire helmets shall meet the requirements of NFPA 1971:2018 (or the current edition) for structural firefighting and proximity firefighting when that option is selected; USOSHA 1910.156, and CAL-OSHA All eye/face protection sold as part of the original helmet assembly shall be compliant with the impact requirements of the current versions of ANSI/ISEA Z87.1 and NFPA 1971:2018. PERFORMANCE VERIFICATION DATA REQUIREMENT: Response to this specification shall include a complete and current NFPA 1971 test report from a recognized, accredited test facility detailing all performance data for the helmet(s) and compliant helmet components included in the original assembly. Certificates of conformance and/or letters of certification alone shall not be acceptable. Component testing is not acceptable. MANUFACTURER’S WARRANTY: Fire helmets to be free from defects in materials and/or faulty workmanship for a period of ten (10) years from the date of manufacture. HELMET SHELL: The fire helmets shall be of the modern fire helmet style. The shell shall have a downsloping brim to enhance watershed. The radius of the juncture of the brim and crown shall be no less than 0.1875” to maximize deflection of debris and impact protection. The shell material shall be a fiberglass composite, consisting of a high-temperature-, flame-, and chipresistant “through-colored” thermoset resin, reinforced with 1” and 2” chopped fiberglass, compression-molded to form a one-piece shell. The exterior of the shell shall be completely coated with a color pigmented, high gloss, abrasion, high heat and chemical resistant paint finish. The shell color and matched paint finish shall be available in the standard colors of white, red and black. The shell dimensions (w/ edge trim) shall be 14.00” (L), 11.13” (W) and have a crown depth of 5.9”. The shell shall have a nominal wall thickness of 0.065”. The shell shall have black or white, high-temperature, flame-resistant, flexible edge trim composed of an aluminum core coated with thermoplastic rubber (TPR). The edge-trim is secured around the entire brim of the helmet by crimping the aluminum core, and secured at the mating ends with a high temperature adhesive and clamped by the helmet hangar clip at the edge of the rear brim. The shell shall have a helmet hanger comprised of a ¾” nickel-plated “D” ring and a stainless-steel clip. The helmet hanger shall be attached to the center rear of the brim. IMPACT CAP: The impact cap shall be comprised of a rigid cell, high-temperature urethane foam dome attached to a flame-resistant, thermoplastic Polyphenylene Oxide (PPO) inner liner that covers the entire inside crown of the helmet. The impact cap shall be modular and field-removable for periodic inspection of the foam’s integrity. HEAD SUSPENSION: The fire helmets shall consist of a six-way head suspension system, attached to the impact cap with three (3) fixed 0.75” wide nylon straps mounted at six points on the impact liner and fastened at their intersection to form the 6-way overhead strap assembly. SHELL RELEASE SYSTEM: The impact liner, complete with suspension system and chinstrap assembly (retained as described under “CHINSTRAP”) shall be retained to the helmet shell by means of two (2) thermoplastic retention clips mounted under the eye/face protection hardware, and by four (4) pieces of hook-and-pile fastener sections between the impact liner and helmet shell in the crown area. This design will enable the shell to be released from the helmet when impacted from below the brim, reducing the chance of being injured by the chinstrap, and leaving the impact cap on the wearer’s head for continued thermal and impact protection. SIZING ADJUSTMENT: The size of the headband must be adjustable to fit the wearer’s head by means of a ratchet adjustment system. The headband height shall be adjustable at the front of the helmet via a hook and loop system to provide additional comfort to the wearer. The headband shall have a head size range of 6-3/8 to 8-3/8, adjustable in 1/8” increments. COMFORT LINER: The helmet shall have a removable comfort liner, consisting of a headband cushion and a ratchet pad with components made of a foam-core laminate system, comprised of a soft black flame-resistant flannel material against the user’s head backed by a soft loop material secured to the headband and ratchet with hook fastener. The liner shall be machine-washable. CHINSTRAP: The chinstrap shall be constructed of three (3) pieces (or sections) of 3/4” wide, spunNomex webbing, connected by a high-temperature, durable thermoplastic quick-release buckle on the side of the helmet. EAR/NECK PROTECTION: The fire helmets shall provide for ear and neck protection with a 6.5” wide, 19.0” long, full-cut earlap. The double-layer earlap consists of a 4.5 oz. / yd., yellow colored Nomex outer layer, and a flame-resistant black flannel inner layer. The earlap shall be secured to the shell by pieces of hook and pile fastener in no fewer than five (5) locations. The ear and neck protector shall be removable without interfering with the overhead strap assembly in any way and without removing any part of the helmet suspension. Earlaps with under-chin extensions shall be available. RETRO-REFLECTIVE TRIM: The helmet shall have three bar shaped pieces of retro-reflective, fluorescent Reflexite trim around the exterior of the crown of the helmet shell. There shall be two additional pieces of bar-shaped Reflexite trim on the front of the top of the helmet for maximum daytime and nighttime visibility.
