BS 851188-2:2019 pdf download.Flood resistance products Part 2: Perimeter barrier systems – Specification
1 Scope
This British Standard specifies requirements for the designation, testing, factory production control, installation manual, deployment instructions, user manual and marking for different types and configurations of flood resistance products. This British Standard is applicable to flood resistance products intended for either temporary installation or to be demountable, for use away from buildings but where they could be sealed against structures or buildings at section ends, in the UK or locations with similar exposures, i.e. where there is a temperate climate. This British Standard specifies the method of testing and an allowable leakage rate. NOTE 1 The test conditions given in Annex A represent typical conditions that can be experienced during a flood. This includes testing the flood resistance product on a concrete base for leakage and structural failure under static water levels, random waves up to 0.1 m high and parallel currents up to 1.0 m/s. NOTE 2 This British Standard does not cover testing with contaminated or saline water; however, product manufacturers are required to provide information about the performance of their products in these conditions (see Annex B).
NOTE 3 Flood resistance products that conform to this British Standard might not be suitable for all locations, exposures and foundation types, for example the primary defence systems for coastal areas, where damage might occur from shingle. NOTE 4 Perimeter barrier systems are normally installed in conjunction with a pumping arrangement to manage any water behind the barrier such as leakage, surface water and groundwater. NOTE 5 The flood protection products described in this British Standard are not intended to provide permanent flood protection. These flood protection products are installed or activated in the event of an imminent flood and removed or deactivated as soon as danger from flooding is over. NOTE 6 Attention is drawn to the need for designers and installers to comply with relevant planning and permitting requirements. This British Standard is not applicable to flood resistance products for installation across building apertures such as individual doors, windows, airbricks and air vents or building skirts. These are covered by BS 851 188-1.
3 Terms and definitions
For the purposes of this British Standard, the following terms and definitions apply.
NOTE Definitions of temporary and demountable flood resistance product types are given in Annex C
3.1 anchor
means of securing the flood resistance product to the ground
NOTE Pins, bolts, chains and sandbags are examples of anchors.
3.2 demountable flood resistance product
component of a demountable flood protection system that is capable of being opened, dismantled or removed from its fully functional state
3.3 demountable flood resistance system
moveable flood resistance system that is either fully pre-installed and requires operation in advance of a flood incident or a system that requires part-installation into pre-installed guides or sockets within a pre-constructed foundation
NOTE A demountable flood resistance system is made up of demountable sections and permanent sections that act together to form a demountable flood resistance system when fully installed.
3.4 designated maximum water depth (DMWD)
depth above the base on which the flood resistance product is installed and for which the flood resistance product is intended to physically resist water entry
NOTE The DMWD is the water depth at which the flood resistance is tested (see AnnexA).
BS 851188-2:2019 pdf download
