Approved by Cabinet of Ministers of 21 April 1998, the regulations No 139 Latvian et seq of the LBN 205-97 "masonry and reinforced masonry structures in the design rules ' 1. General questions 1 et seq of This wall determines and reinforced masonry construction design standards for new buildings and structures and compensated.
2. The wall and reinforced masonry structures to use such constructive solutions, products and materials: 2.1. external walls from hollow ceramic or concrete stones and bricks, from the ease of a brick wall with thermal insulation boards or porous aggregates of starpkārt, aizbērum of the endless rocks and concrete blocks with porous fillers and from porous to concrete and šūnbeton. Use exterior body wall in n o silicate solid brick of clay or allowed only dry or normal moisture mode the room walls, to ensure their strength;
2.2. the wall of panels and the large size of the blocks, made of different types of concrete, as well as from the bricks or stones;
2.3. v ietēj-natural stone materials.
3. In rooms with increased humidity mode the exterior walls, the silikātķieģeļ allowed to use stones and blocks, as well as stones and blocks of šūnbeton, solid-keramisko and stones; semi-arid in the presēto clay bricks are allowed to use, if the inner surface of the wall are steam insulation. These materials are not allowed to use exterior rooms with wet mode, as well as a basement and walls of the CAP. The moisture regime determined in accordance with the Latvian et seq.
4. If there are compelling reasons in exceptional cases are allowed to use constructive solutions, products and materials that are not mentioned in this paragraph 2 et seq.
5. at the time of Construction and operating conditions, as well as prefabricated during transport and Assembly to ensure the construction of the wall and the strength and persistence of the elements.
6. Designing the buildings and premises should be made for measures to ensure the construction and the winter conditions.
2. materials and reinforced Wall 7. masonry construction used bricks, stones and mortar and concrete, used in the manufacture of rock and lielblok must comply with the applicable requirements of the standards or technical regulations, and have the following brands and class: 7.1 the stones to push the phrase (the bricks also takes into account the bending strength) mark 4, 7, 10, 15, 25, 35, 50 (stones with low strength for example, aggregate and natural stones); 75, 100, 125, 150, 200 (stones with the strength of the medium, such as bricks, ceramic, natural stone and concrete); 250, 300, 400, 500, 600, 800, 10 0 0 (stones with high strength, such as brick, natural stone and concrete);
7.2. the concrete with compressive strength class B3, 5; B5; B7, 5; B12, 5; B15; B20; B25; B30 (heavy concrete), B2; B2, 5; B3, 5; B5; B7, 5; B12, 5; B15; B20; B25; B30 (porous concrete with the fillers), B1; B2; B2, 5; B3, 5; B5; B7, 5; B12, B1, 5 (šūnbeton); B2; B2, 5; B3, 5; B5; B7, 5 (macro-porous or putubeton), B2, 5; B3, 5; B5; B7, 5 (aerated concrete), B12, 5; B15; B20; B25; B30 (silicate concrete); as the insulation allowed to use concrete, which push is 0.7 MPA phrase (7 kgf/cm2) and 1.0 MPa (10 kgf/cm2), but iemūrējum and plates-not less than 1.0 MPa (10 kgf/cm2);
7.3. mortar with compressive phrase mark 4, 10, 25, 50, 75, 100, 150, 200;
7.4. stone materials with salizturīb mark F10 F15, F25, F35, F50, F75, F100, F150, F200, F300; salizturīb mark concrete is the same, except mark F10.
8. the stone material of salizturīb mark wall projected for external part (12 cm in thickness) and foundations (the entire thickness) should be taken depending on the expected lifetime of the structure (not less than 100, 50 and 25 years) in accordance with table 1. Design stamps set only those materials that are expected to be based in the top part could wall (to the bottom of the depths of the caursalšan party).
9. the Reinforcement of masonry structures in accordance with the Latvian et seq of the LBN 203-97 "concrete and reinforced concrete structures design rules": for reinforcement with sieve 9.1 (A)-(I) and DB-I class string;
9.2. garenstiegr and šķērsstiegr, the anchors and links-A-I, A-II and Bp-I class string, subject to this provision, paragraph 30.
10. Insert the metal components and connecting parts use steel in accordance with Latvian et seq of the LBN 204. table 1 type of Design for the design of the F values for lifetime (in years) 100 50 25 1. Outer wall or siding buildings with the following premises: moisture regime a) dry and normal 25 15 15 b) c) 50 35 25 2 35 25 15 wet wet. Fundamentals and part of the walls below ground : a) plastic pressed clay brick 35 25 15 b) natural stones (rubble), etc.
25 15 15 notes.
1. From all types of manufactured stones, concrete blocks and panels of salizturīb marks must be used in accordance with the Latvian et seq of the LBN 203.2. Wall of plastic pressed clay bricks salizturīb specified in table 1 of the mark may be reduced for one degree, but not below the F10 in such cases: 2.1 external walls and dry rooms with normal humidity (heading 1a), which are protected from the outside by finishing a round 35 mm, not thinner than that match the specified salizturīb in table 1 the requirements for finishing brick and ceramic stones salizturīb must be not less than all of the design lifetime F25 limits;
2.2. the external walls with a wet room and wet treatment (1 b and 1 c), which are protected from the inside with a waterproofing or steam insulating layers;
2.3. the Foundation and parts of the walls below ground, if so is the sidewalk or border-bottom, which is a small amount of moisture and groundwater level in comparison to the Earth planējum the mark is less than 3 m and more (2).
3. Salizturīb mark that position 1 in apmūrējum (finishing rounds), which are thinner than the 35 mm, is increased by one degree, but not higher as the F50.
4. Stone material salizturīb brands (2) used and the parts of the walls below ground, to be raised by one stage, where the groundwater level is lower than the land mark of planējum less than 1 m. Open design wall 5, as well as the design of masonry structures that are built in the area of variable groundwater level (supporting wall, reservoirs, water drainage, boundary stones URu.tml.), salizturīb brand of stones taken from the special design rules.
6. After consulting the customer may refuse inspections requirements of salizturīb natural stone materials, taking into account the previous construction experience, analoģisko operating conditions shown sufficient salizturīb.
3. calculation of the wall descriptions, calculates the resistance 11. Calculate the compressive resistance R, MPA (kgf/cm2) all the way to the brick, as well as ceramic stones (with a vertical cavity spraugveid, no bigger than 12 mm) wall with a row height of 50-150 mm, using heavy mortar, given in table 3.
12. Calculate the compressive resistance of Cor, MPA (kgf/cm2) brick wall, vibrate using heavy mortar, given in table 2.
table 2 brick mark calculates the compressive resistance of Cor, MPA (kgf/cm2) brick wall, vibrate using heavy mortars with a mark of 200 150 100 75 50 300 (56) 5.6 5.3 (53) (48) 4.8 4.5 (45) (42) 250 4.2 5.2 (52) 4.9 (49) (44) 4.4 4.1 (41) 3.7 (37) 200 (48) 4.8 4.5 (45) 3.6 4.0 (40) (36) (33) 150 4.0 3.3 (40) (37) 3.7 3.3 (33) (34) 2.7 3.1 (27) 125 (36) 3.6 3.3 (33) 2.9 3.0 (30) (29) 2.5 (25) 100
(31) 2.9 3.1 (29) 2.7 2.6 (26) (27) (28) 2.3-2.5 75 (25) 2.2 2.3 (23) (22) (20) 2.0 notes.
1. Calculate the compressive resistance of brick wall vibrates in thicker than 30 cm, taken after table 2 with the factor 0.85. table 2 shows the compressive resistance calculation applies to wall bars, is 40 cm in width, and more.
13. Calculates the compressive resistance R, MPA (kgf/cm2) wall from all types of concrete continuous (full) lielblok and from natural stone blocks (or sawed away smoothly carved) with a wall round the height of 500-1000 mm given in table 4.