Pemko 145 Series Fire-Rated Interlocking Threshold with Water ReturnThe Pemko 145 Series is a fire-rated interlocking threshold engineered for pre-hung door openings where water intrusion and fire code compliance are both requirements. At 4″ wide x 7/8″ high, it fits standard residential and light commercial door frames and ships with a #61 J-hook and nails for a complete installation. Available in Mill Finish and Dark Bronze Anodized aluminum, in 36″ and 72″ lengths (custom lengths from 24″ to 185″ available).Features & BenefitsFire-Rated: UL 10C positive pressure certified and cUL Listed 4L10 meets code requirements for fire-rated door assemblies.Water Return System: Integrated channel catches water driven or running under the door and returns it to the exterior, preventing interior moisture damage.Interlocking Design: Mates with the door bottom for a positive seal; reduces air infiltration and sound transmission at the sill.Aluminum Construction: Corrosion-resistant aluminum base; available in Mill Finish (145A) and Dark Bronze Anodized (145D).Complete Installation Hardware: Furnished with #61 J-hook and nails; alternate hooks available for non-standard applications.Flexible Lengths: Stock in 36″ and 72″; custom cut from 24″ minimum to 185″ maximum to fit any opening width.Optional Pan Accessory: Companion pan available separately for enhanced water management in high-exposure conditions.Technical SpecificationsDimensions: 4″ W x 7/8″ HMaterial: AluminumFinish Options: Mill Finish Aluminum (A), Dark Bronze Anodized Aluminum (D)Available Lengths: 36″, 72″ (custom: 24″ min 185″ max)Certifications: BHMA Certified, UL 10C Positive Pressure Fire Rated, cUL Listed 4L10Installation Hardware: #61 J-hook and nails includedTypical ApplicationsFire-rated door assemblies in commercial and multi-family buildingsPre-hung residential and light commercial entry doorsMulti-unit residential and hospitality propertiesEducational and healthcare facility doorways requiring fire-rated thresholdsWeather-exposed openings requiring active water return