BS 4873:2016 pdf download. Aluminium alloy windows and doorsets – Specification.
6.5 Openable windows and doors
For windows and doors that are intended to be openable, the opening sashes or door leaves however designed shall move freely and smoothly without hindrance throughout their intended range of movement.
In horizontally and vertically sliding windows and sliding doors, adjacent aluminium members shall not slide upon each other.
In horizontally sliding windows and sliding doors, the sashes or door leaves shall be supported on bearing devices that facilitate movement and prevent direct contact between the sash and the track.
In vertically sliding windows, the mechanism or balancing device shall be accessible for adjustment, repair or replacement, after the windows have been installed.
6.6 Frame joints
Joints in frames shall be made either by welding or by mechanical means (e.g. cleating, screwing and gluing) and shall have flush, stepped or lapped surfaces. For flush joints formed by mechanical means, any deviation from the same plane shall be within the limits set by the use of extrusion tolerances given in
BS EN 755-9 or BS EN 12020-2.
NOTE The use of L shaped plates (chevrons) in mitred joints should be used to help achieve the required finish, and the weather performance of metal-to-metal joints benefit from the application of suitable sealing compounds during manufacture.
Welded joints shall be cleaned off smooth on surfaces that are exposed when the window is in the closed position and where the joints would otherwise project into the glazing space.
7 Glazing
Windows and doorsets shall be glazed in accordance with the relevant part of the BS 6262 series and BS 8000-7.
NOTE Attention is drawn to the glazing safety recommendations of 85 6262-4, particularly the requirements for marking the glass.
8 Use, cleaning and maintenance
Guidance on the use, cleaning and maintenance of aluminium windows and doorsets shall be provided by the manufacturer to the customer.
9 Security
9.1 Basic security
When a completed window or doorset is subjected to the basic security test specified in BS 6375-3, it shall not be possible to gain entry.
9.2 Enhanced security
When enhanced security is required, windows and doorsets shall conform to
BS 6375-3.
NOTE Guidance on security against crime is given in 85 8220.
BS 4873 pdf download.