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New PDF release: Dächer begrünen einfach und wirkungsvoll - Planung,

By Gernot Minke

ISBN-10: 393689650X

ISBN-13: 9783936896503

Grüne Dächer sind nicht nur schön anzusehen: Sie bilden wertvolle Biotope in der Stadt, verbessern die Luft und haben erhebliche bautechnische wie auch bauphysikalische Vorzüge: Sie kühlen im Sommer, wärmen im wintry weather und verlängern die Lebendsdauer eines Daches. Hinzu kommt, daß sie - auch nachträglich - einfach und preisgünstig herzustellen sind.

In diesem Bauratgeber wird praxisnah und leicht verständlich gezeigt, wie Wohn- und Bürogebäude, aber auch Garagen und Carports mit einem Gründach ausgestattet werden können.

Der Autor informiert ausführlich und anhand vieler Fotos und Zeichnungen, was once es bei der Planung zu berücksichtingen gilt und welche unterschiedlichen Dachaufbauten möglich sind. Er stellt bewährte Systeme zur Begrünung von flachen und geneigten Dächern mit allen wichtigen konstruktiven information vor, macht Angaben über Kosten und Wirtschaftlichkeit, gibt Hinweise für den Selbstbau und nennt Bezugsquellen.

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Additional info for Dächer begrünen einfach und wirkungsvoll - Planung, Ausführungshinweise, Praxistipps

Example text

In those cases where the circuits concerned are subject to overload, having used the above method to determine the correct conductor crosssectional areas from consideration of current-carrying capacity it is then necessary to check these areas to ensure that the circuits are adequately protected against overload. To do this the methods given earlier in this chapter are used and it becomes necessary to determine the grouping factor (Cg) for each circuit. 34 Electrical Installation Calculations This is given by: Cg ¼ Ig  F g Ita where, as before: Ig ¼ group current-carrying capacity, A (see Step 6) Fg ¼ factor (again see Step 6) Ita ¼ tabulated current-carrying capacity, A for a single circuit (in trunking), for the cable concerned.

If Ib ¼ 70 A, ta ¼ 358C and l ¼ 30 m what is the voltage drop? Answer From Table 4D4A Column 2, tp ¼ 708C and Ita ¼ 89 A. Also tr ¼ 308C. 8 milliohms/m. 6 A three-phase circuit is run in multicore sheathed and non-armoured cable having 858C rubber insulation and copper conductors of 10 mm2 crosssectional area. The cable is mounted in free air (Reference Method 13) and is not grouped with other cables. If ta ¼ 508C, l ¼ 20 m and Ib ¼ 45 A what is the voltage drop? Answer From Table 4F2A Column 7, tp ¼ 858C and Ita ¼ 71 A.

8 V, there would have been no need to use other than this simple approach to calculate the voltage drop. 13 Eight similar single-phase circuits are grouped together, clipped direct, each having Ib ¼ 24 A and protected against overload and short circuit by a 30 A BS 3036 semi-enclosed fuse. The circuits are run in nonarmoured 708C two-core (with cpc) pvc-insulated and sheathed cables to BS 6004. If ta ¼ 308C and 1 ¼ 70 m what is the minimum conductor crosssectional area that can be used and what is the voltage drop?

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Dächer begrünen einfach und wirkungsvoll - Planung, Ausführungshinweise, Praxistipps by Gernot Minke


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