AS 1892.1 pdf download

AS 1892.1 pdf download.Portable ladders
1.5 DEFINITIONS
For the purpose of this Standard, the definitions below apply (see also Figure 1.1). 1.5.1 Articulation A hinge that is capable of being locked in one or more positions. 1.5.2 Brace A rigid member (typically diagonal) used to enhance stiffness and strength, for example, at a tread to stile connection.1.5.3 Composite A homogeneous or layered material created by the synthetic assembly of two or more materials (a selected filler or reinforcing elements and a compatible matrix binder), to obtain specific characteristics and properties. 1.5.4 Domestic ladder A ladder designed to be used by a householder for construction, maintenance and repairs carried out at a private dwelling for non-commercial purposes. 1.5.5 Double-sided stepladder A self-supporting portable ladder of fixed length with two pairs of stiles which are— (a) hinged or fixed; and (b) each fitted with treads for ascent and descent. 1.5.6 Dual-purpose stepladder A self-supporting portable ladder of which the back section is fitted with rungs or treads, and which can be further adjusted to provide an extension of the front section as a non-self-supporting portable ladder (in the extended position). 1.5.7 Duty rating The rating assigned to the ladder, i.e. industrial or domestic, that indicates the service capability of the ladder. 1.5.8 Effective length The length of a ladder less end caps and feet, where fitted. 1.5.9 E-glass A borosilicate glass, the type most frequently used for glass fibre for reinforced plastics, suitable for electrical laminates because of its high resistivity. 1.5.10 End cap A terminating piece fixed to the end of a stile to cover and/or protect the end of the stile. 1.5.11 Extension ladder A non-self-supporting portable ladder, consisting of two or more sections travelling in guides, including interlocking stiles or brackets arranged in order to permit adjustment of length. 1.5.12 Fibreglass A glass-reinforced plastic, where the most common plastic encountered would be polyester. The composite possesses directional properties, as well as specific mechanical, electrical, anti-corrosion and weathering characteristics. 1.5.13 Handrail A component that provides additional assistance for ascending or descending a ladder or provides an alternate hand hold opportunity.1.5.16 Multipurpose ladder (multifold ladders) A portable ladder having one or more pairs of articulation joints that allow the ladder to be rearranged to function as a single ladder, with or without a stand-off, as a single or double- sided stepladder, or work platform. 1.5.17 Overlap The distance by which each section of an extension ladder coincides with its matching section. 1.5.18 Permanent set An irreversible deformation that remains in a structure or material after it has been subjected to stress. 1.5.19 Platform A horizontal structure of substantial size on which the user will stand. 1.5.20 Platform stepladder A self-supporting portable ladder with a specially designed platform near the top, to provide a maximum height working area. 1.5.21 Polyesters Thermosetting resins produced by dissolving unsaturated, generally linear, alkyd resins in a vinyl-type active monomer including styrene, methyl styrene, or diallylphthalate. Cure is effected through vinyl polymerization using either peroxide catalyst and promoters or heat to accelerate the reaction. 1.5.22 Portable ladder A readily movable piece of equipment consisting of stiles (see Clause 1.5.35) joined at regular intervals by cross-pieces called rungs or treads (see Clause 1.5.27), on which the user may stand or step when ascending or descending. 1.5.23 Pultrusion A continuous moulding process whereby reinforcing fibres are saturated with a liquid polymer resin and then carefully formed and pulled through a heated die to form a part. Pultrusion results in straight constant cross-section parts of virtually any shippable length. 1.5.24 Rail A rigid member (typically horizontal) linking the stiles. 1.5.25 Reinforced plastic A plastic with strength properties greatly superior to those of the base resin as a result of high-strength fillers embedded in the composition. The reinforcing fillers include fibres, fabrics, or mats made of fibres.