Byggnadsstommar

Ämnesområden: Tekniska aspekter; Murverk
Kommittébeteckning: SIS/TK 180 (Murverk och Puts)
Källa: CEN
Svarsdatum: den 16 dec 2019
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(1) The basis for the design of building and civil engineering works in masonry is given in this Part 1-1 of EN 1996, which deals with unreinforced masonry, reinforced masonry and confined masonry. Principles for the design of prestressed masonry are also given. This Part 1-1 of EN 1996 is not valid for masonry elements with a plan area of less than 0,04 m2.

(2) Part 1-1 of EN 1996 gives detailed rules which are mainly applicable to ordinary buildings. The applicability of these rules can be limited, for practical reasons or due to simplifications; any limits of applicability are given in the text where necessary.

(3) Execution is covered to the extent that is necessary to indicate the quality of the construction materials and products that to be used and the standard of workmanship on site needed to comply with the assumptions made in the design rules.

(4) For those types of structures not covered entirely, for new structural uses for established materials, for new materials, or where actions and other influences outside normal experience have to be resisted, the provisions given in this Part 1-1 of EN 1996 can be applied, but with possible need for supplements.

(5) Part 1-1 of EN 1996 does not cover:

— resistance to fire (which is dealt with in EN 1996-1-2);

— particular aspects of special types of building (for example, dynamic effects on tall buildings);

— particular aspects of special types of civil engineering works (such as masonry bridges, dams, chimneys or liquid-retaining structures);

— particular aspects of special types of structures (such as arches or domes);

— masonry where gypsum, with or without cement, mortars are used;

— masonry where the units are not laid in a regular pattern of courses (rubble masonry);

— masonry reinforced with other materials than steel.

Kommittébeteckning: SIS/TK 182 (Trä)
Källa: CEN
Svarsdatum: den 21 jan 2020
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This European Standard gives a method for determining characteristic values of mechanical properties and density, for defined populations of visual grades and/or strength classes of machine graded structural timber. Additionally it covers the stages of sampling, testing, analysis and presentation of the data. The standard provides methods to derive strength, stiffness and density properties for structural timber from tests with defect-free specimen. The values determined in accordance with this standard for mechanical properties and density are suitable for assigning grades and species to the strength classes of EN 338. NOTE 1 For assigning grades and species to the strength classes in EN 338 only three properties, i.e. bending or tension strength, modulus of elasticity parallel to grain in bending or tension and density need to be determined from test data, other properties can be calculated according to Table 2. NOTE 2 EN 1912 gives examples of established visual grades assigned to strength classes.

Kommittébeteckning: SIS/TK 182 (Trä)
Källa: CEN
Svarsdatum: den 21 jan 2020
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This document specifies requirements additional to those given in EN 14081-1 for factory production control of machine graded structural timber with rectangular cross-sections shaped by sawing, planing or other methods, and having deviations from the target sizes corresponding to EN 336.

Kommittébeteckning: SIS/TK 182 (Trä)
Källa: CEN
Svarsdatum: den 21 jan 2020
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This document specifies requirements, additional to those of EN 14081-1, for type testing of machine graded structural timber with rectangular cross-sections shaped by sawing, planning or other methods, and having deviations from the target sizes corresponding to EN 336. This includes requirements for strength grading machines.