3.1 Concrete
3.1.1 General
(1)P The following clauses give principles and rules for normal and high strength concrete.
(2)P Rules for lightweight aggregate concrete are given in Section 11.
3.1.2 Strength
(1) The compressive strength of concrete is denoted by concrete strength classes which
relate to the characteristic (5%) cylinder strength fck, or the cube strength fck,cube, in accordance
with EN 206-1.
(2) The strength classes in this code are based on the characteristic cylinder strength fck
determined at 28 days with a maximum value of Cmax.
Note: The value of Cmax for use in a Country may be found in its National Annex. The recommended value is C90/105.
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Signboards
In general, signboards must be placed after approval of their project . If you want to place a signboard in front of your shop, restaurant, bank office or other object, please contact us. We will consult you what kind of documents are necessary and we will prepare your project.
Glazing of balcony
In Bulgaria glazing of balconies should have a project and a building permit . If you want to glaze your balcony, contact us. We will consult you what kind of documents are necessary and we will prepare your project.
Design of new building
Every new building should have a project and a building permit. If you want to build in your own property, please contact us to discuss your investment plans. We will consult you what kind of documents are necessary and we will prepare your project. It is necessary to bring all documents for the property - ownership document and others.
Change of use
Change of the use of a building or part of it can be done after a project and building permit. If you want to reorganize or change the use of a building or part of it, contact us to discuss your ideas. We will consult you what kind of documents are necessary and we will prepare your project. It is necessary to bring all documents for the building - ownership document, old projects and permits.