EN 12629-7:2004

This European Standard is intended to be used together with EN 12629-1:2000 "Machines for the manufacture of constructional products from concrete and calcium-silicate - Safety - Part 1: Common requirements", which specifies general requirements of machines for the manufacture of constructional products from concrete and calcium-silicate.The manufacturing bed is a machine with which other associated machines work simultaneously. Moreover, these machines are generally used on beds installed in parallel.This standard gives particular requirements for the design of the following machines:- Pre-stressing bed (schematic representation is given in annex A);- Bed sweeper, vacuum cleaner, oiler, wire-guide machine (schematic representation is given in annex B);- Bed layout machine (schematic representation is given in annex C);- Strand pushing/pulling machine (schematic representation is given in annex D);- Spinner, extruder, vibrodistributor (schematic representation is given in annex E);- Tarpaulin paying out and winding in machine (schematic representation is given in annex F);- Sawing machine (schematic representation is given in annex G).NOTEThe manufacturing operations include some or all of the following:- treating pre-stressing bed with release agent;- "marking out" the elements (slabs, plain slabs, etc.) to be made;- running the pre-stressing strands;- pre-tensioning;- installing the shutterings, (formwork, side shutters, end plates and inserts)- fixing reinforcement;- tensioning;- concrete distribution and compaction;- winding out the tarpaulin;- heating;- detensioning;- removal of shettering, formwork, etc. ;- strands cutting or sawing;- removal of final products;- bed cleaning.The concrete supply interface which is taken into account for safety is also considered.