The Bilco S-20 Type S Roof Hatch is a galvanized steel access point designed for building exteriors. It provides ladder access and is available in a standard 36" x 30" size. The documentation details installation procedures, available options such as thermal breaks and powder coating, and replacement parts. This article provides a comprehensive overview of the S-20 model based on available information.
Product Overview and Specifications
The Bilco S-20 Type S Roof Hatch is constructed from galvanized steel. It is designed for ladder access to a roof or elevated surface. The standard dimensions are 36 inches by 30 inches. Technical drawings are available to assist with installation preparation. The rough opening dimensions can be found in the provided technical documentation.
Installation Procedures
Installation of the S-20 roof hatch requires adherence to the technical drawing provided by the manufacturer. For installations in wood frame buildings with 24-inch on-center roof trusses, a special order size of 21 inches wide may be required. The installation process does not deviate from the guidelines outlined in the technical drawing. Local building codes should be consulted to ensure compliance.
Thermal Break Option
The Bilco S-20 Type S Roof Hatch is available as a thermally broken unit, designated as the Bilco S-50TB Type S Thermally Broken Roof Hatch. This version features an aluminum cover and curb. Thermally broken hatches incorporate R-20+ insulation in the frame and cover, minimizing heat transfer between the interior and exterior metal surfaces. This design aims to resist condensation and improve energy efficiency. The thermally broken design is available in standard single-leaf sizes and custom sizes are available upon request.
Available Finishes
The standard finish for the Bilco S-20 Type S Roof Hatch is galvanized steel. However, a powder coat finish is available as an option, subject to a quote from the manufacturer. Users requesting this option should specify the desired color.
Replacement Parts
A range of replacement parts are available for the Bilco S-20 roof hatch. These include:
- Lifting Mechanism: The Bilco RPRS180 Replacement 180lb Lifting Mechanisms for Roof Scuttle is available as a replacement for the original lifting mechanism.
- Latch Handle and Lock Body Assembly: The Bilco RPRS7 Replacement Zinc Plated - Chromate Sealed Lock Assembly 4# - 4-5/8" Shaft is available for replacing the latch mechanism.
- Hold Open Track and Arm Assembly: The Bilco RPRS3445P 14 1/4" Left Hand Hold Open Arm is available as a replacement part.
- Shock/Lifting Mechanism: The Bilco RPRS180 is also identified as a replacement shock or lifting mechanism.
Load Capacity
The documentation indicates that the roof hatch can support a 65 psf live load, but requires specification of the hatch size and base material composition to confirm.
Clarification on Model Numbers
The documentation references the Bilco Model Type S-10, but does not provide specific details regarding this model beyond its existence. The S-20 model is the primary focus of the available information.
Rough Opening Dimensions
The rough opening dimensions for the Bilco S-20 Type S Roof Hatch - Ladder Access - 36" x 30" - Galvanized Steel are detailed in the provided technical drawing. This drawing is intended to aid in the preparation for installation.
Conclusion
The Bilco S-20 Type S Roof Hatch is a galvanized steel access point with available options for thermal breaks and powder coating. Proper installation requires adherence to the provided technical drawings and consideration of local building codes. Replacement parts are readily available for maintaining the functionality of the hatch. The availability of a thermally broken version (S-50TB) offers improved energy efficiency.