Roof Hatch Models
    Type S-20C, E-20C, NB-20C, S-50C, E-50C, NB-50C
     
    Standard Features and Benefits 
    - 
        Engineered with compression spring operators to provide smooth, easy, one-hand operation, regardless of size
    
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        Automatic hold-open arms lock the covers in the open position to ensure safe egress
    
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        Overlapping cover design, full welded corners on covers and curb, EPDM rubber gasket, and fully insulated cover and curb ensure weathertightness and energy efficiency
    
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        Constructed with corrosion resistant materials to provide many years of trouble free, dependable service
    
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        Heavy gauge construction and positive latching mechanism maintain building security
    
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        Type Security Series hatches are available in many sizes and curb configurations to satisfy any requirement or installation
    
     
    Guide Specifications 
    - 
        Material (select one):
            - 
                Steel: Cover and frame are 3/16" (5 mm) steel.
            
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                Aluminum: Cover and frame are 3/16" (5 mm) aluminum.
            
 
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        Cover: Brakeformed, hollow-metal design with 1" (25 mm) concealed fiberglass insulation, 3" (76mm) beaded, overlapping flange, fully welded at corners, and internally reinforced for 40 psf (195 kg/m2) live load.
    
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        Curb: 12" (305mm) in height with integral capflashing, 1" (25 mm) fiberboard insulation, fully welded at corners, and 3-1/2" (89mm) mounting flange with 7/16" holes (11mm provided for securing frame to the roof deck.
    
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        Gasket: Extruded EPDM rubber gasket permanently adhered to cover.
    
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        Hinges: Heavy-duty manganese bronze hinges
    
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        Latch: Factory prepared to receive a deadbolt detention lock (specify manufacturer and model #), supplied and installed by others in the field. Consult factory if an alternate lock is required
    
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        Lift Assistance: Compression spring operators enclosed in telescopic tubes. Automatic hold-open arm with grip handle release.
    
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        Finish:
            - 
                Steel: Alkyd base red oxide primer.
            
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                Aluminum: Mill Finish
            
 
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        Hardware: Type 316 stainless steel spring tubes with steel compression springs packed in grease. All other hardware is zinc plated/chromate sealed.
    
    U.S. Patents  5,960,596  6,347,818