English Translation

Copy Der Reichsarbeitsminister Berlin SW 11, the 28 February 1945 IVà 3 Nr. 5/45 g Saarlandstr. 96 An /Secretly the state governments the lords Reichsstathalter in de Reichsgauen, the gentlemen government presidents and don Mr. Verbandspresidente n Esser InII Betritft: Baudicken gegen Bordwafierschlag Elng.: - 9. MRZ. 1945 Abolished the circular of 8 June 1944. Iya 3 No. 4l/44 g - I inform you that according to the Minister of Aviation, the minimum thickness of components intended to provide safety against fire from aircraft (safe against on-board weapons currently in use: calibers up to 2 cm) proved to be sufficient: 1. Wall bricks (hard fire brick according to DIN lo5 and crosshole brick according DIN 4l5l) in lime cement mortar 64 cm, 2. Mortar stones (i.e. masonry limestone sandstones, hut stones, slag stones, etc.) - with medium compressive strength between 30 and t50 kg/cm2 in lime cement mortar 77 cm, 3. Dry brickwork made of bricks (as in l.) 75 cm, 4. Dry brickworks made of mortar stones (like in 2.) 87 cm, 5. Stamp concrete and reinforced concrete 70 cm, 6. (b) Nasser Sand (as in a) 120 cm, 7. Earth (sandy loam, mother's floor, etc.) between Zölliger Holzschallung 120 cm. These dimensions are in some cases considerably higher than the building thicknesses, which, for protection against bombers, are split according to the "determinations for structural execution against protection against injuries" - version September 1942 - (cf. Rd. Er1. of 30 September 1942 IV b 7 No. 8800/381/ 42 -). The Minister of the Reich of Aviation has pointed out that: a) Splinter protection structures and components should only be carried out safely on board if the danger of immediate fire can be assumed from aircraft. Splitter protection cells for observers and emergency personnel or splitter protection walls for important plant facilities within factory halls are generally only splinterproofly executed, the German Minister of State during for Bohemia and Mühren in P r a g St.Mvi. n-16/45g 046/458