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GB 50681-2011: Code for design of machinery building architecture
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Code for design of machinery building architecture
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GB 50681-2011
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Basic data | Standard ID | GB 50681-2011 (GB50681-2011) | | Description (Translated English) | Code for design of machinery building architecture | | Sector / Industry | National Standard | | Classification of Chinese Standard | P34 | | Classification of International Standard | 91.040.20 | | Word Count Estimation | 149,172 | | Date of Issue | 2011-05-12 | | Date of Implementation | 2012-05-01 | | Quoted Standard | GB 50010; GB 50011; GB 50016; GB 50037; GB 50046; GB 50108; GB 18871; GB 8702 | | Regulation (derived from) | Ministry of Housing and Urban Notice No. 1027 | | Issuing agency(ies) | Ministry of Housing and Urban-Rural Development of the People's Republic of China; General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China | | Summary | This Chinese standard applies to the following areas: construction, expansion and renovation of the mechanical industrial plant and its ancillary buildings architectural design, machinery industrial plants ionizing radiation chamber architectural design, machinery industrial plants electromagnetic shielding room, shielding frequency is 0. 15MHz ~ 3OMHZ additional shielding of buildings architectural design. | GB 50681-2011: Code for design of machinery building architecture---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
1 General
1.0.1 This specification is formulated in order to make the architectural design of mechanical industrial workshops and their auxiliary buildings safe and applicable, advanced in technology, environmentally friendly and energy-saving, economical and reasonable, easy in construction and easy in maintenance.
1.0.2 This specification applies to the following scopes.
1.Architectural design of newly-built, expanded and rebuilt machinery industrial plants and their auxiliary buildings;
2 architectural design of ionizing radiation chambers in mechanical engineering plants;
3 The electromagnetic shielding room in the machinery industry factory, the shielding frequency is 0.15MHz ~ 30MHz The architectural design of adding a shielding layer to the building.
1.0.3 The architectural design of machinery industrial workshops and their auxiliary buildings shall not only conform to this code, but also comply with the current relevant national standards.
2 terms
2.0.1 united workshop
A factory building composed of multiple craft workshops.
2.0.2 attachment building
Office, scientific research and technology, living and sanitation facilities, warehouses and other supporting buildings arranged adjacently for the production and service of machinery industrial plants, or independently set up in the plant area.
2.0.3 Electromagnetic shielding room
Prevent electrostatic or electromagnetic mutual induction facilities.
2.0.4 Crane beam slidewalk
Along the length of one side of the beam surface of the workshop crane, a board for the staff to walk is arranged.
2.0.5 crane work grade crane work grade
Cranes are classified according to load status and utilization level.
3 basic rules
3.0.1 Machinery industrial plant and its ancillary buildings shall be designed according to the conditions of production, functional properties, process requirements, land and energy saving, environmental protection and sanitation, local meteorology, hydrology, geology, material supply, construction and development and expansion.
3.0.2 When the height difference of a multi-span factory building is less than 1.2m, it is not appropriate to set a height difference; when the non-heating multi-span factory building has only one low span on the high-span side, and the height difference is less than 1.8m, it is not suitable to set a height difference.
3.0.3 The ground elevation of buildings and structures shall be determined according to the following provisions.
1 The indoor ground elevation of the building should be higher than the outdoor ground elevation, and the value should not be less than 0.15m;
2.The ground elevation of the open-air warehouses or storage yards equipped with bridge type and gantry cranes shall be 0.15m higher than the surrounding site, and a drainage slope of 0.3% to 0.5% shall be set;
3 The elevation difference between indoor and outdoor ground of buildings in collapsible loess areas shall be determined according to the type and level of subsidence of the foundation, and its value should be 0.2m to 0.3m;
4 The indoor ground elevation of flammable and combustible liquid storage shall be 0.15m lower than the elevation of the warehouse entrance;
5 The indoor ground elevation of calcium carbide storage shall be higher than the outdoor ground, and its value shall not be less than 0.25m;
6 The elevation of the railway track top in the building shall be the same as the elevation of the building ground.
3.0.4 When there are girder cranes or bridge cranes in the workshop, the net distance between the outer edge of the crane bridge frame and the inner edge of the upper column shall not be less than 100mm; Meet the following requirements.
1 It shall meet the requirements of the minimum outline size of the crane and the limit size and safety clearance of the crane;
2 The space requirements for crane maintenance shall be met;
3 It shall meet the requirements when the foundation of the powerhouse is embedded on soft soil, collapsible loess, expansive soil foundation, and the settlement difference of adjacent columns occurs due to the surcharge of the ground of the powerhouse;
4 It shall meet the requirements when the roof truss or the bottom surface of the roof beam is suspended with a sloped horizontal pipe or the lower chord of the roof truss is directly installed with lighting fixtures.
3.0.5 Combined factory buildings shall meet the following requirements.
1 The architectural form of the factory building should be adapted to local conditions;
2 It is not suitable to build adjacent auxiliary buildings around the factory building;
3.Along the vertical and horizontal directions of the factory building, and in combination with the internal transportation passages of the factory building, ventilation doors or ventilation aisles should be set; skylights, exhaust caps or ventilation roofs should be used on the roof;
4.The sections that emit heat, smoke and corrosive media should be arranged on the outer wall of the factory building; for the local sections that are seriously affected, mechanical ventilation and exhaust should be adopted with smoke exhaust hoods;
5 Measures should be taken to reduce the mutual influence of workshops with different production properties.
3.0.6 Class A and B production sites and warehouses with explosion hazards should be located near the outer wall of a single-story factory building or on the top floor of a multi-storey factory building near the outer wall. The relevant provisions of the standard "Code for Fire Protection Design of Buildings" GB 50016.The pressure relief facilities on the roof shall take measures to prevent the accumulation of ice and snow.
3.0.7 Anti-cracking and anti-leakage measures should be taken for the external walls of the workshop and its ancillary buildings.
3.0.8 Anti-corrosion and moisture-proof measures should be taken for doors, windows and hardware accessories of doors and windows in coastal areas or workshops with corrosive gases and high humidity.
3.0.9 The roof waterproof grade and the reasonable service life of the waterproof layer of the factory building and its auxiliary buildings shall meet the following regulations.
1.The roof waterproof grade of large and important single, multiple and high-rise factory buildings and combined factory buildings shall be Class II, and the reasonable service life of the waterproof layer shall be 15 years;
2 The roof waterproof grade of single-storey and general factory building and its auxiliary buildings shall be Grade III, and the reasonable service life of the waterproof layer shall be 10 years;
3 For non-permanent buildings, the waterproof grade of the roof shall be Class IV, and the reasonable service life of the waterproof layer shall be 5 years.
3.0.10 When coiled material or coating film waterproof layer is used, its thickness shall be determined according to the roof waterproof grade, the number of fortification channels and the selected waterproof material.
3.0.11 When the single-layer roof waterproof system is used, in addition to the construction requirements of the selected waterproof material single-layer roof system, it shall also meet the requirements for the reasonable service life of the waterproof layer specified in Article 3.0.9 of this code.
3.0.12 When the single slope span of the roof is greater than 9m, structural slope finding should be done, and the slope should not be less than 3%.
4 roof
4.1 Roof structure
4.1.1 The roof structure shall be determined according to the structural characteristics of the roof, high and low spans, temperature difference deformation, drying shrinkage deformation, roof slope, vibration and other factors, and shall meet the following requirements.
1 The measures of flexible sealing, combination of anti-drainage, combination of material waterproof and structural waterproof shall be adopted;
2 It is advisable to adopt the secondary fortification that complements and uses coiled material, waterproof coating film, sealing material, rigid waterproof material, etc.;
3 The roofs in earthquake fortified areas or areas with strong winds and typhoons should be fixed and strengthened;
4 The base treatment agent, adhesive, sealing strip, caulking ointment and colorant should be compatible with the selected waterproof material;
5 Except for the single-layer roof waterproof system, a protective layer shall be provided on the flexible waterproof layer. When the protective layer is cement mortar, fine stone concrete or block material, grid joints should be provided. The grid joints shall be filled with sealing material. An isolation layer should be provided between the protective layer and the waterproof layer.
4.1.2 When multiple waterproof materials are used in combination, the following regulations shall be met.
1 When selecting coils with different carcass and properties for composite use, the high-performance coils should be placed on the surface layer;
2 The aging-resistant and puncture-resistant waterproof material should be laid on the top layer;
3 Adjacent materials should be compatible and complementary;
4 When the coil material and the coating film are used together, the coating film should be laid on the lower layer;
5 The upper part of the synthetic polymer waterproof membrane and coating film should not be hot-melt membrane or coating;
6 Coiled materials, coating films and rigid waterproof materials are used in combination, and an isolation layer should be set between them, and the rigid waterproof layer should be set on top;
7 The overlapping seams of coiled materials and coatings shall be sealed tightly with material-compatible sealing materials.
4.1.3 When the roof structure layer is a prefabricated reinforced concrete slab, fine stone concrete with a strength grade of not less than C20 should be poured into the slab joints to fill the slab joints tightly; The backing material should be filled on the expansion agent, the upper part of the backing material should be embedded with sealing material, and a protective layer should be set on the exposed sealing material at the joint.
When the seam width is greater than 40mm or narrow at the top and wide at the bottom, structural reinforcement should be provided in the slab seam, and the slab end seam should be flexibly sealed. For roofs without insulation layer, grooves should be reserved on the side seams of the panels and should be sealed.
4.1.4 The joints between the roof waterproof base and the protruding roof parapet, vertical wall, skylight wall, deformation joint, chimney, etc., as well as the corners of the rainwater outlet, gutter, eaves, roof ridge, yin and yang corners, etc., and the roof base, should be The leveling layer is made into circular arcs with different radii, and additional waterproof layers should be set at the junctions and corners.
4.1.5 A rigid protective layer should be laid around the facility on the roof and the sidewalk between the roof entrance and the facility. At the junction of the rigid protective layer and the parapet, gable and protruding roof structure, a gap with a width of 30mm should be left, and the sealing material should be embedded and compacted.
4.1.6 The design of high and low span roofs shall meet the following requirements.
1 The waterproof treatment at the deformation joints of high and low spans shall adopt materials and structural measures that can adapt to deformation;
2 When the high-span roof has unorganized drainage, an additional layer of coiled material should be laid on the part of the low-span roof that is washed by water, and a prefabricated C20 reinforced concrete slab with a width of 300mm-500mm and a thickness of 25mm-30mm should be laid on it for reinforcement. Protection; when the high-span roof is for organized drainage, a prefabricated reinforced concrete water dustpan or protective plate with a thickness of 25mm to 30mm should be installed under the rainwater pipe.
4.1.7 The masonry parapet shall be topped with reinforced concrete, and the top surface of the top shall be drained inwardly.
4.1.8 When the slope exceeds 25%, the roof or eaves veneer tiles on the slope should be pasted with polymer cement mortar, and polymer cement slurry or polymer cement mortar should be used for jointing.
4.1.9 The waterproof design of roof joint sealing shall meet the following requirements.
1 Roof joint sealing and waterproofing should be used in conjunction with membrane waterproof roofing, film-coated waterproof roofing, rigid waterproof roofing, etc.;
2 The joint width for roof sealing and waterproofing should be 5 mm to 30 mm, and the joint depth should be 0.5 to 0.7 times the joint width;
3 For the base layer of the connection part of sealing and waterproof treatment, the base treatment agent compatible with the material of the sealing material should be painted;
4 Backing material shall be provided at the bottom of the sealing material at the seam, and the width of the backing material shall be 20% greater than the width of the seam.
4.5.1 The design of the roof thermal insulation layer shall meet the following requirements.
1 The roof insulation layer should be made of materials with hydrophobicity or low water absorption, and loose materials should not be used;
2 The moisture content of the closed insulation layer should be equivalent to the equilibrium moisture content of the material in the local natural air-dried state;
3 When the base layer of the roof thermal insulation layer is a prefabricated reinforced concrete slab, the slab joint treatment shall comply with the provisions of Article 4.1.3 of this code;
4 The indoor thermal calculation parameters of the factory building and its auxiliary buildings in winter should comply with the provisions of Appendix A of this code;
5 The thickness of the roof thermal insulation layer shall be calculated and determined according to the building thermal design requirements;
6 In hot summer and cold winter regions, the insulation layer can also be used as a heat insulation layer, and its thickness can be calculated and determined according to the heat insulation requirements;
7 In areas north of latitude 40° and the indoor air humidity is greater than 75%, or in other areas where the indoor air humidity is greater than 80% all the year round, if hygroscopic thermal insulation materials are used as the roof thermal Waterproof membrane or waterproof coating with good airtightness and watertightness; the vapor barrier layer should be connected with the waterproof layer of the roof, and should form a fully enclosed whole.
4.5.2 The structure of the insulation layer shall meet the following requirements.
1 When the insulation layer is set on the upper part of the waterproof layer, a protective layer should be used on the insulation layer; when the insulation layer is set on the lower part of the waterproof layer, a leveling layer should be used on the insulation layer;
2 When the slope of the roof is greater than 25%, anti-skid measures shall be taken for the insulation layer;
3 The gutters and eaves of the heat-insulating roof should be provided with insulation layers that are related to the indoor space; the roof insulation layer at the junction of gutters, eaves and roofs should extend to not less than 1/2 of the wall thickness.
4.5.3 The design of overhead heat insulation roof shall meet the following requirements.
1 The slope of the overhead insulation roof should not be greater than 5%, the height of the overhead insulation layer should be 180mm to 300mm, and the distance between the overhead board and the parapet wall should not be less than 250mm;
2 When the roof width is greater than 10m in hot summer and warm winter regions and greater than 15m in hot summer and cold winter regions, measures such as ventilated roof ridges should be taken;
3 The air inlet should be set in the positive pressure area, and the air outlet should be set in the negative pressure area.
4.5.4 Buildings with good ventilation should use overhead heat-insulating roofs, but overhead heat-insulating roofs should not be used in cold regions.
4.5.5 The design of the planting roof shall meet the following requirements.
1 The roof structure layer shall be cast-in-place integral reinforced concrete slab;
2 The waterproof layer should choose rigid-flexible composite waterproofing, the flexible waterproofing layer should use corrosion-resistant, mildew-resistant, puncture-resistant, and water-resistant materials, and the rigid waterproofing layer should be set on the upper part;
3 An enclosure wall should be set up around the planting roof, and the height of the wall should be 100mm higher than the planting medium. Weep holes and drainage pipes should be left at the height of 100mm from the bottom of the enclosure wall, and measures should be taken to avoid the loss of the planting medium;
4 The materials and plants used for planting the roof shall meet the requirements of environmental protection, partition layout shall be provided with retaining walls or baffles, and the planting medium and thickness shall be determined according to the types of plants to be planted;
5 Pedestrian passages shall be set up on the planting roof.
4.5.6 The design of the inverted roof shall meet the following requirements.
1 The waterproof grade of the inverted roof shall not be lower than Grade II;
2.The material of the waterproof layer should adopt materials with strong adaptability to deformation and high seam sealing guarantee rate;
3 The insulation layer should be dry-laid or pasted board-shaped hydrophobic or non-absorbent and non-rotten insulation materials;
4 The surface of the thermal insulation material should be provided with a rigid protective layer;
5 When rigid polyurethane foam is sprayed on-site for the inverted roof insulation layer, the surface should be painted with a coating film as a protective layer, and there should be compatibility between them;
6 The eaves and rainwater outlets of inverted roofs shall be plugged with cast-in-place reinforced concrete or bricks, and drainage shall be done well.
4.6 Metal profiled roofing
4.6.1 Metal profiled plate roofs shall meet the following requirements.
1 For the roof of metal profiled plate, the metal profiled plate and building structure with suitable performance should be selected according to the roof waterproof level and the reasonable service life of the waterproof layer;
2 When the slope of the metal profiled plate roof is less than 5%, anti-leakage measures shall be taken;
3 The protruding length of the metal sheet roof cornice shall not be less than.200mm;
4 When the metal profiled plate roof is opened, the type selection of the flashing structure should be done well;
5 In typhoon areas or buildings higher than 50m, windproof measures should be taken;
6 For open buildings in areas with large wind loads, when the upper and lower sides of the roof panels are subject to large wind pressure at the same time, structural measures to strengthen the connection shall be taken.
4.6.2 The laying, fixing and lapping of metal profiled plate roofs shall comply with the following regulations.
1 When the roof gutter is made of metal sheet, the depth of the roof metal sheet should not be less than 100mm; when there is a gutter, the roof metal sheet should extend into the gutter, and the length of the extension should not be less than 50mm. The eaves of the roof should be sealed with special-shaped metal plates; the gables should be sealed with special-shaped metal plates and fixed brackets;
2 The roof ridge shall be covered with a metal ridge cover, and a flashing baffle and a flashing plug shall be installed at the end of the roof;
3 The flashing height of the metal profiled plate roof shall not be less than 250mm. Sealing measures should be taken at the joints;
4 When the metal profiled plate roof is single-slope, the roof ridge shall be covered with corner-wrapped plates;
5.The metal profiled plate is connected by fasteners and undercuts. Locking screws should not be used for connection. The fixing and lap joints should be sealed and there should be no leakage;
6 The gutter or eaves of the metal profiled plate roof shall be provided with reinforcing ribs every 3m.
4.7 Roof drainage
4.7.1 Roof drainage shall meet the following requirements.
1 The roof drainage method should be determined according to local natural conditions, rainfall, cornice height, production properties, roof drainage slope, drainage area and other conditions;
2 When using organized drainage, external drainage should be used;
3 Except for the metal profiled plate roof, the longitudinal slope of the drainage gutter and gutter of the roof shall not be less than 1%; the water drop at the bottom of the ditch shall not exceed.200mm. Drainage from gutters and eaves shall not flow through deformation joints and firewalls; when the longitudinal slope in the ditch faces deformation joints and firewalls, rainwater outlets shall be installed on both sides;
4 Unorganized drainage should be used for roofs that are prone to dust accumulation; when organized drainage is used, anti-blocking measures should be taken.
4.7.2 Under any of the following circumstances, organized drainage should be used on the roof.
Areas where the annual rainfall is less than or equal to 900mm, and the distance between the eaves and the ground is greater than 8m;
2 The span of the skylight is greater than 12m;
3 High eaves when the height difference between adjacent roofs is greater than or equal to 4m;
4 High eaves in areas where the annual rainfall is greater than 900mm, and the distance between the eaves and the ground is greater than 5m or the height difference between adjacent roofs is greater than or equal to 3.5m;
5 Roofs in collapsible loess areas;
6 The side of the heating area with the span of the open-air crane;
7 Skylight roofs with open or semi-open skylights.
4.7.3 The layout and section of rainwater outlets and rainwater pipes shall be determined according to the calculation of catchment area. There should not be less than 2 rainwater outlets for each roof or gutter. The nominal diameter of the rainwater pipe should not be less than 100mm. The distance between the center of the rainwater outlet and the inner edge of the parapet wall at the end should not be less than 500mm. The distance between the rainwater pipe and the wall should not be less than 20mm, the height between the drain and the water slope should not be greater than.200mm, and a 45° elbow should be provided.
4.7.4 The calculated temperature of outdoor heating in winter is lower than -20°C for roof rainwater in severe cold areas, and internal drainage should be used. The rainwater pipes shall be connected to the rainwater drainage pipe network, and the interface shall be tightly sealed and shall not be connected with sewage pipes. At the end of the roof gutter, an overflow should be provided.
4.7.5 For a flat roof, the slope of the roof within.200mm to 500mm near the gutter and gutter should be 5%, and the minimum depth at the watershed should be greater than or equal to 40mm. The slope within a diameter of 500mm around the rainwater outlet should not be less than 5%, and the rainwater outlet should be sealed with waterproof paint, and its thickness should not be less than 2mm. At the contact between the rainwater outlet and the base layer, a groove with a width of 20mm and a depth of 20mm should be left, and a flexible sealing material should be embedded.
4.7.6 The middle gutter of the multi-span factory building shall be arranged in combination with the expansion joints of the building, and the gable at both ends shall be used for drainage; the gutter wall at the part of the gable shall be provided with an overflow.
4.7.7 The slope of the inner gutter and the inner gutter of the metal plate roof should be 0.5%. The gutter wall at the part of the wall shall be provided with an overflow. Inner gutters and gutters in cold regions should take anti-snow and freezing measures.
4.7.8 Roof rainwater pipes in collapsible loess areas shall be directly connected to specially designed rainwater open ditches or rainwater pipes.
4.7.9 When unorganized drainage is used for the roof, the length of the roof protruding from the wall should not be less than 600mm. At the entrance and exit of the building, an awning should be provided.
4.7.10 When the roof of a low-rise building protrudes from the wall and unorganized drainage is used, the width of the water distribution should be 300mm greater than the protruding width of the roof.
4.7.11 When the roof adopts internal drainage, the rainwater pipes shall be exposed pipes, and the bending shall be reduced, and shall not be built in the load-bearing walls or pre-embedded in the concrete columns. Drainage grates shall be installed at the rainwater outlet of the roof, and an inspection hole with a sealed opening shall be provided at the lower end of the rainwater pipe or at the place connected to the horizontal pipe.
5 walls
5.0.1 The selection of masonry wall materials shall meet the following requirements.
1 The wall material of the non-load-bearing internal partition wall should be bricks or blocks with a strength grade greater than or equal to MU5.0, and the mixed mortar with a strength grade greater than or equal to M5.0 should be used for masonry;
2 The wall base below the moisture-proof layer shall be built with solid bricks or blocks, and shall not be built with hollow bricks, silicate bricks and aerated concrete blocks. When small concrete hollow blocks are used, the holes shall be filled with concrete with a strength grade not lower than Cb20.The strength grade of bricks and blocks should be greater than or equal to MU10.0, and the strength grade of stone blocks should be greater than or equal to MU20.0.When used in severe cold areas and wet soil, its strength grade should be increased by 1 grade. The masonry below the moisture-proof layer shall be built with cement mortar with a strength grade greater than or equal to M7.5;
3 The infill wall of the frame structure floor should adopt lightweight bricks or blocks, and there should be tie measures with the frame beams and columns, and the matching masonry mortar should be used for masonry;
4 Lightweight brick and block wall materials shall meet the requirements of fire prevention and moisture resistance;
5 wet room...
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