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SNIP II-26-76 - Roofs

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SNIP II-26-76 - Roofs

State Committee c About beta
Ministers of the USSR on the construction works
GOSSTROY USSR)

building regulations

SNIP II-26-76

roof

approved by decree of the Council of Ministers of the USSR State Committee for construction of 31 December 1976 number 226

Chapter SNIP II-26-76 «roofs» designed TsNIIpromzdaniya USSR State construction Committee with the participation of TsNIIEPzhilischa Gosgrazhdanstroya,TsNIIEPselstroya Minselstroya USSR CNIISK.Kucherenko USSR State Construction Committee and VNIIproektasbesttsementa Minstroymaterialov USSR.

With the introduction of the head of SNIP II-26-76 loses force "Instructions for the design of roll and mastic roofs of buildings and structures of industrial enterprises" (SN 394-74).

Change, approved by the USSR State Committee on June 27, 1979 № 101 and from January 1, 1980 entered into force entered in the text of the document, changed items are marked with *.

State Committee of the USSR Council of Ministers for Construction (Gosstroy USSR) Building Regulations SNIP II-26-76
Roofs Instead
CH394-74

1. GENERAL PROVISIONS

1.1.The rules of this chapter must be observed in the design of roll roofing, mastic materials of asbestos-cement corrugated sheets for buildings and structures for various purposes.

attic coatings for residential and public buildings when the feasibility study is allowed to provide the roof panels of reinforced concrete chute section according to the table.1 of these Standards.

Made
TsNIIpromzdany
USSR State Committee
approved

decision of the State Committee of USSR Council of Ministers

Affairs
construction on December 31, 1976 № 226
Term enactment
January 1, 1978Mr.

materials used for roofing elements and coatings, for which there is no state standards must meet the requirements stipulated by the technical specifications or other normative and technical documentation industry value of these materials and these standards.

Table 1

type roofs Slopes,% Impacts on the roof
nagrevanie1), 2) to a temperature, ° C, not more than mechanical (bumps) 3), kgf × m,no more alkaline rastvorov4) acid rastvorov4)
1. from the roll materials (roll) and mastics reinforced glass materials (mastic):
a)a protective layer of gravel 0 - less than 10 65 2 Dopuskayutsya5) Dopuskayutsya6)
b) with a top layer of materials with coarse-grained or scaly 10-257) 75 1 Dopuskayutsya8) »
2. Roll with a protective layer:
a) of concrete slabs and armotsementnyh 0 - less than 2,5 65 10 allowed not allowed
b) of cement-sand mortar same 65 5 » same
c) of sandy asphalt concrete » 65 5 » allowed
3. Because asbestos-cement corrugated sheets 10-33 80 not allowed » not allowed
4. Thatalso, when used in the IVA and IVG climatic subareas 10-20 80 same » same
5. From concrete panels trough secheniya9) 5-10 80 5 » »
1) of the roof heating temperature is determined by calculation (taking into account technological heat release) according to the norms of building heating engineering and building climatology.To reduce the heating temperature of the roof should be used materials of protective layers (eg, gravel) light colors.Under the influence of local sources of radiant heat corresponding portions of roofs should be protected from bottom hanging screens.2) In sections covering buildings with high heat dissipation, where warming conditions can not be used roll, mastic and asbestos cement materials, it is allowed to provide appropriate justification roofing sheet steel.3) Shock effects when using crowbars conventionally equated to impact hard objects weighing 30 kg from a height of 1m, at drawing solid objects with sharp corners and edges - subjects weighing 10 kg, when working with metal shovels - items weighing 5 kg, working with woodshovels - objects weighing 1 kg.4) provides for the possibility of influence on the roof periodically Moisturizing industrial discharge containing aggressive media.5) Mastics must contain additives based on annotated.3 to the table.3. 6) Gravel used for the protective layer must be of igneous rocks that are resistant to acid solutions.7) In the areas of roofs with a slope of more than 25%, is permitted in exceptional cases, when the length of the slope more than 1.5 m is necessary to provide for the use of a heat-resistant sealant (for Tables. 3 for a device the junction) and fastening waterproofing carpet Tolev nails size 2'25mm (GOST 4029-63) by 200 mm to wooden battens antiseptic to be embedded in the base under the roof with a view of the width of assigned roll materials and the need for stacking them with an overlap on the roof slope of at least 70 mm.8) According to the waterproofing mat is necessary to provide for application of mastic in accordance with para. 2.12.9) For panels should apply concrete grades: waterproofing - B 6 - B-10, according to frost - at least SSE 200 (GOST 4795-68, GOST 4800-69).When using panels trough section of the concrete waterproofing brand B-6 is necessary to provide for coloring the face of the panels with one of the following compounds: a prominent suspension thiokol T-50 1mm thick;HT solution Nairit 1 mm thick;Bitumen-butyl rubber mastic MBB-X-120, 2 mm thick.In places skipping ventilation blocks, pipes and other engineering equipment concrete panels trough section should have a hole with a frame, projecting to a height of not less than 100 mm.

1.2.Choosing the type of roofing should be done on the table.1 depending on their biases, taken in view of the rules of design and construction of the buildings, construction areas and impacts on the roof.

Roofs of roll and mastic materials are preferably used on slopes up to 2.5%;provide such a roof on slopes greater than 12% is permitted with appropriate justification.

1.3.The working drawings of roofs must be specified:

roof structure, the name and the brand of materials and products with links to state standards or technical specifications;

value deviations, the installation location of drainage funnels and location of expansion joints;

parts of roofs in places of installation of drainage funnels and abutting the walls, parapets, ventilation and elevator shafts, cornices and other structural elements.

The working drawings of the construction part of the project should be given to the need to develop measures for fire protection and monitoring compliance with fire safety regulations and rules for safety in the production of construction and installation works.

1.4.On surfaces with supporting steel profiled decking is not permitted for vehicles and equipment with combustible materials, flammable and combustible liquids and gases.

2. Roofs of rolled and mastic materials

roofing design and the materials used

2.1.Construction of roofs from rolled and mastic materials, depending on the slope and the materials used should be provided in accordance with Table.2.

Table 2

slope roof% roof type roof type main waterproofing carpet protective layer on top of the waterproofing mat
0 - less than 2,5 Roll K-1 4 layer on the wood tar mastic: a) roofing waterproofing coating film with brand TG-350 and TG-300 (GOST 10999-76) b) roofing waterproofing waterproofing anthracene brand TAG-350 layer of gravel on the wood tar mastic according. with clause 2.10
K-1A same For roofs that are filled with water - a layer of gravel 20 mm thick wood tar mastic
K-2 4 layer on bitumen mastic: a) waterproofingmarks GI-T, GI-K (GOST 7415-74 * b) roofing antiseptic tarry brand RMD-350) with roofing waterproofing coating film marks the TG-350 and TG-300 (GOST 10999-76) d) roofing waterproofing anthracene brandwaterproofing TAG-350 gravel layer to tarry or antiseptic asphalt mastic
K-2A same For roofs that are filled with water - a layer of gravel 20 mm thick tarry or antiseptic asphalt mastic
K-3 4 layers Fiber-glass brand C-RM (GOST 15879-70) on the asphalt mastic gravel layer on bitumen mastic antiseptic
K-3A 4 antiseptic layer on bitumen mastic: a) roofing material with an elastic coverfiber brand SEM-350 b) roofing antiseptic tarry brand RMD-350) roofing roofing with fine-grained grades RCM-350B, 350B-RCM (GOST 10923-76) d) roofing underlayment with silty grained grades PSC-350B, PSC-350B(GOST 10923-76) same
K-4 5 layers on wood tar mastic: a) roofing waterproofing coating film with brand TG-350 and TG-300 (GOST 10999-76) b) roofing waterproofinganthracene brand waterproof TAG-350 to exploited roofs - in accordance with clause 2.11
K-4A 5 layers on antiseptic bitumen mastic: a) waterproofing marks GI-T, GI-K (GOST 7415-74.*) b) roofing antiseptic tarry brand RMD-350 to exploited roofs -. in accordance with paragraph 2.11
mastic K-5 4 layers of bitumen or bitumen-rubber mastic with four reinforcing pads of glass fiber gradesBB-F, IV-K or fiberglass marks CCC, CC-1 gravel layer on bitumen mastic antiseptic or bitumen-rubber mastic
2,5 - less than 10 Roll K-6 3layer wood tar mastic: a) roofing waterproofing coating film with brand TG-350 and TG-300 (GOST 10999-76) b) roofing waterproofing waterproofing anthracene brand TAG-350) roofing antiseptic tarry brand RMD-350 layer of gravelwood tar or asphalt mastic
K-7 3 layer on bitumen mastic: a) fiber-glass brand C-RM (GOST 15879-70) b) of roofing material with an elastic cover layer brand SEM-350) roofing roofing with fine-grainedBrand RCM-350B, 350B-RCM (GOST 10923-76) d) roofing underlayment with silty grained grades PSC-350B, PSC-350B (GOST 10923-76) layer of gravel on the asphalt mastic
mastic K-8 3 layers of bitumen or bitumen-rubber mastic with four gaskets glass fiber reinforcing BB-1 brands, BB-K or fiberglass marks CCC, CC-1 gravel layer on bitumen and bitumen-rubber mastic
10-25 Roll K-9 2 layer (lower) at the mastic asphalt: a) fiber-glass brand C-RM (GOST 15879-70) b) of roofing material with an elastic cover layer brand SEM-350) roofing underlaymentantiseptic tarry brand RAP-300 d) roofing roofing with fine-grained grades RCM-350B, 350B-RCM (GOST 10923-76) d) roofing underlayment with silty grained grades PSC-350B, PSC-350B (GOST 10923-76) e)roofing underlayment with fine-grained grades PRM-300A, 300B-RPM, RPM-300V (GOST 10923-76) g) glassine roofing grades of P-350, P-300 (GOST 2697-75) layer 1 (top) at the mastic asphalt:a) Steklobit grades P-RK, C-RF (GOST 15879-70) b) of roofing material coarse-grained wood tar antiseptic brands RKD-420, RKD-350) of roofing material with color brand RCC-grained 420 g) of roofing material with an elastic covering layerand coarse-grained or scaly grit brand cancer-420 or ReCh-350 d) roofing roofing with coarse or flaky grit marks RSC-500A, RSC-400A, RCM-400B, RSC-400V, RKCH-350B, RKCH-350V, (GOST 10923-76) in valleys - a layer of gravel on the width of the gain waterproofing carpet in accordance with clause 2.3
mastic K-10 2 layers of bitumen or bitumen-rubber mastic reinforced with two gaskets of glass fiber grades BB-.T, BB-K or fiberglass marks CCC, CC-1;1 layer (top) of the roofing material with coarse or flaky grit (according to the type of roofing K-9) on the bitumen or bitumen-rubber mastic in valleys - a layer of gravel on the width of the gain of the main waterproofing carpet
Roll K-11 2 layer (lower) weldable roofing brand RM-500-2;1 layer (upper) weldable roofing brand RC-500-2 or RK-420-1 same
K-12 1 layer (lower) weldable roofing brand RM-500-2;1 layer (middle) weldable roofing mark RM or RM-420-1 350-1;1 layer (upper) weldable roofing brand RC-500-2 or RK-350-1 in valleys - a layer of gravel on the width of the gain of the main waterproofing carpet
Notes: 1. It is necessary to provide a primer solution fiberglass fifth grade bitumen in kerosene, prepared in a weight ratio of 1: 2.The mastic roofs, reinforced fiberglass, is allowed to reduce the number of layers one layer of mastic and reinforced linings.2. In the roofs of K-9 should not be used underlayment roofing and asphalt at the base of thermal insulation materials (without screed).3. Roof type K 1 - K-5 on lamps shall consist of a three-layer waterproofing mat and a protective layer of gravel.4. It is necessary to provide coloration of roofing types K-9 - K-12 paint BT-177 (GOST 5631-70 *).if the top layer of roofing material has a coarse-grained or scaly.The project should indicate that the color to be renewed after 2-3 years.5. For residential buildings, constructed in the I and II climatic areas permitted under the relevant feasibility study on slopes of 2-3% of the roof design of the type K-9, providing the lower layer 3 of the above materials and the top layer 1 of the Fiber-glass brand C-RK or roofing material with colored sprinkles brand RCC-420 or roofing material with coarse grit marks RSC-500A, RSC-400A, 400B-RSC, RSC-400V.6. Roofs, filled with water, allowed to provide in accordance with the calculation on thermal stability in areas with average July temperature of 25 ° C and above.

2.2.Mastics for roofing device should be used depending on the area of ​​construction, type and slope roofs, in accordance with Table.3.

Table 3

construction areas Mastic Stamps mastics device
sections of roofs with a slope of% places contiguity
less than 2,5 2,5 - less than 10 10 - 25
north of latitude 50 ° to 53 ° European and Asian parts of the USSR to tarry hot (GOST 3580-67) MDC-T-50 MDK-g-60 nottolerance. MDC-T-70
hot bitumen (GOST 2889-67) ICB-G-55 ICB-G-65 ICB-G-75 ICB-G-85
Bitumen-rubber hot IDB-G-55 IDB-G-65 IDB-G-75 IDB-G-85
bituminous cold IBC-X-65 not allowed
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