Masonry Layout

(BS) EN 318 : 2002 Wood-based panels – Determination of dimensional changes associated with changes in relative humidity This specifies a method for determining dimensional changes in wood-based panels due to changes in the relative humidity of the air.  This is measured between 65% relative humidity and 85% relative humidity in adsorption and 65% relative humidity and 30% relative humidity in …

(BS) EN 317 : 1993 Particleboards and fibreboards – Determination of swelling in thickness after immersion in water Despite its title, the standard is applicable to Oriented Strand Board.  It specifies a method of determining the swelling in thickness of flat-pressed or drum-pressed particleboards including OSB. Swelling in thickness is determined by measuring the increase in thickness of the test piece …

(BS) EN 315 : 2000 (confirmed 2014) Plywood – Tolerances for dimensions This gives the dimensional tolerances of plywood panels (length, width and thickness) and tolerances for squareness and edge straightness at a moisture control of 10% (±2%). Moisture content is measured according to EN 322: Wood-based panels – Determination of moisture content. The method for measuring thickness, width and length …

(BS) EN 313-2: 2000 (confirmed 2014) Plywood – Classification and Terminology – Terminology This standard defines the principal terms concerning plywood.

(BS) EN 313-1: 1996 (confirmed in 2015) Plywood – Classification and Terminology – Classification This standard lists the three main classifications for plywood. General appearance According to their construction  veneer plywood, blockboard, laminboard or composites According to their form and shape Flat or moulded Principal characteristics According to their durability For use in dry, humid  or exterior conditions According to their …

(BS) EN 310: 1993 Wood-based panels: Determination of modulus of elasticity in bending and of bending strength This specifies a method of determining the apparent modulus of elasticity in flatwise bending and bending strength of wood-based panels of nominal thickness ≥ 3mm. The modulus of elasticity in bending and bending strength is determined by applying a load to the centre …

(BS) EN 300 : 2019 Oriented Strand Boards (OSB) – Definitions, classification and specifications This defines the terms, establishes a classification and specifies requirements for OSB.  The values appearing in this standard relate to the products properties but they are not characteristic values to be used in design calculations. See OSB Use Classes and durability issues   – this was …

(BS) EN 314-2: 1993 (confirmed in 2013) Plywood – Bond quality – Requirements This part of the standard specifies the requirements for bonding classes of veneer plywood according to their end uses.  It lists three classes of bond quality. Bond Class 1: Dry conditions ‒ interior applications with no risk of wetting. This is equivalent to a moisture content in the plywood corresponding …

Plywood – Bond quality – Test methods This standard specifies methods for determining the bonding quality of veneer plywood, by shear testing. Before carrying out the shear tests the plywood samples are required to undergo a sequence of pre-treatments e.g. section 5.14 calls for immersion for 72 hours (±1) in boiling water followed by cooling in water at 20°C (±3°) …

(BS) EN 636:2012+A1:2015 Plywood – Specification This gives the requirements for plywood for general purpose use and for structural (load bearing) applications in dry, humid and exterior conditions. It also gives a classification based on bending properties. Amendment 1 : 2015 makes the following modifications to EN 636 : 2012 a) The scope now clarifies that the standard includes overlaid …