BS 4873:2009 pdf download – Aluminium alloy windows and doorsets – Specification

BS 4873:2009 pdf download – Aluminium alloy windows and doorsets – Specification 5.5 Fixings all straps, clips, brackets, lugs, and similar fixing devices and their attendant screws, bolts etc. shall be capable of meeting the applied wind and operational loads and shall achieve a minimum corrosion resistance of grade 3 (96 h) as specified in BS En 1670:2007. NOTE 1 Screws, nuts, bolts, rivets, metal washers, shims and other fixings should be tested in the “as used” condition. NOTE 2 Spacer shims used at fixings, which serve only as packing and do not influence the structural integrity of the fixing, may be of extruded or moulded plastics material. NOTE 3 Austenitic stainless steel is the preferred material for fixings subject to external forces and corrosive influences. 5.6 Glazing materials Glass thickness and type shall be selected using the recommendations given in BS 6262‑1, BS 6262‑2, BS 6262‑3, BS 6262‑4 and/or BS 6262‑7, as appropriate, to withstand the design wind pressure calculated in accordance with BS 6375‑1 or BS 6399‑2. the exposed edges of glass adjustable louvre blades shall be arrised, ground or polished. insulating glass units shall conform to BS En 1279. 6 Construction and design NOTE The accessible parts of finished windows should as far as reasonably practicable be free from all sharp edges, burrs etc. 6.1 Work sizes the work sizes for overall length and height shall be documented. 6.2 Manufacturing tolerances the size of an assembled frame shall be within ±1.5 mm of the documented work size (6.1) in any dimension, and the difference between the diagonals of the assembled frame shall be not more than 4 mm. 6.3 Design for glazing the frame design shall be such that: the window can be glazed in accordance with BS 6262; a) reglazing is possible without the need to remove the outer frame b) from the structure of the building; it is possible to renew the weatherseals without removing the c) outer frame from the structure of the building; it is possible to replace the hardware without removing the outer d) frame from the structure of the building. 6.4 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...