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Reprinted from alumni of the user at 15:04 on May 24, 2010 Reading (loading. ..) Comments (1) Category: Personal Diary
one, flat ground: the thickness of the building site within the ± 30cm cut, fill, transport, and leveling.
1, land leveling and calculation rules
(1) list of rules: the icon size by design the first floor area of a building.
(2) a fixed rule: according to the design icon size to the outside line of external walls of buildings on each side plus two meters in square meters floor area.
2, flat ground formula
S = (A +4) × (B +4) = S end of +2 L +16
outside where: S --- flat ground quantities; A --- length of the external walls of buildings outside the line length; B --- width of the external walls of buildings outside the line length; S --- the end of the bottom floor area of buildings; L --- outside the building outside perimeter wall edges.
The formula is applicable to any rectangle formed by the building or structure calculation the site formation works.
Second, the foundation excavation of earthwork excavation calculated
calculation rules
(1), list of rules: basic earthworks dug by the design basis for the icon size to cushion the bottom area by digging Soil depth calculation.
(2), the fixed rule: manual or mechanical excavation bottom area should be multiplied by the volume of excavation depth calculation. Bottom area should be multiplied by the bottom of the long bottom width, length and width of bottom is the bottom width plus the basis of face, when you need to put slope, slope of the earthwork should be put on the total combined volume of the earth.
2, earthwork excavation formula:
(1), list the volume calculation of excavation: excavation earthwork volume = area × digging depth of the bottom.
(2), the fixed rule: foundation trench excavation: V = (A +2 C + K × H) H × L. Where: V --- foundation trench earthwork; A --- bottom width; C --- face width; H --- base slot depth; L --- length of foundation trench. .
Which the length of wall to wall foundation trench centerline calculation, the length of the interior walls of net-based long-slot basis, the transfer of a coincidence not to be deducted.
excavation: V = 1/6H [A × B + a × b + (A + a) × (B + b) + a × b]. Where: V --- pit volume; A-Pit catchy length; B --- pit catchy width; a --- the length of pit bottom; b --- pit bottom width.
three, back to the filling of the rules and calculation formulas
1, foundation trench, pit backfill volume = foundation trench (pit) excavation volume - The following building design outdoor floor (structure) part of the volume of material is embedded.
outdoor terrace where the following construction (structures) are embedded part of the volume generally include bedding, wall base, column base, and underground buildings and structures, the size of a
2 ,
new balance outlet, interior backfill volume = net area between the main wall thickness Backfill × - the volume occupied by a variety of channel between the main wall
net area = S at the end - (L + L in the × × thickness of the wall thickness of the wall)
where: --- the end of the bottom floor area; L --- external walls of the center line in length; L --- within the walls of net long-term length.
backfill height minus the thickness of the ground means the indoor and outdoor cushions, leveling layer, the total thickness of the surface layer, such as the right:
four, transport rules and earthwork calculation formula:
refers to the excavation of earth after the excess soil to the designated location, or lack of backfill backfill borrow from the designated locations. Moving transport should be different modes of transport and distance to cubic meters, respectively.
excavation of earth works volume = total volume - total volume of backfill
where the results are positive, said more than soil Sinotrans, said negative dug backfill.
five, fighting, pressure precast reinforced concrete square piles
1, hit the volume of precast reinforced concrete piles, pile length according to the design of volume, the length of the pile tip by including the full length of Jisuan , the virtual volume without deduction of the pile tip. Unit: m3, the volume is calculated as follows:
V = pile cross-sectional area × design pile length (including the length of the pile tip)
2, get reinforced concrete square piles (pile): When the design requirements the top of the reinforced concrete piles into the ground below, the pile must use tools to complete the pile, the pile using tools (usually 2 ~ 3m long, from hardwood or metal) to complete the piling of the process is called Method provided by a fixed length of the pile to pile to the top floor plus a natural cross-sectional area multiplied by 0.5 meters to cubic meters, measurement unit: m3, the formula is as follows:
V = pile cross-sectional area × (pile length of +0.5 m)
pile length - the design of pile top elevation to the natural floor.
3, then pile: pile connecting means according to the design of the plant by a section of prefabricated pile transported to the site first first pile into the vertical lifting the second pile, and connected to the first pile and then continue to pile by pile
sulfur clay - Unit: m2; by cross-sectional area
welded pile pile - Unit: t; angle or package by package weight of steel.
six, playing, prestressed concrete pressure pipe
according to the design pile length of volume, length, by including the full length of the pile tip calculation, the virtual volume without deduction of the pile tip, the hollow pipe volume should be deducted from the hollow part of the design requirements of pipe pouring of concrete or other filler material, should be calculated. Unit: m3, the volume is calculated as follows:
V = pile cross-sectional area × design pile length (including the length of the pile tip)
grouted piles in engineering calculation, measurement unit: m3
V = hole diameter pipe pile design of cross-sectional area × depth
grouted seven piles
(1) drilling sinking piles singles, multiple play: Unit: m3
V = tube diameter cross-sectional area × (design length of pile length + plus irrigation)
design pile length - the length of the design drawings under the pile tip, such as use of valves, including precast pile tip, the use of precast reinforced concrete pile tip is Length does not include
plus irrigation - to meet the concrete filling volume infusion, according to design requirements; no requirement, taking into account by 0.25m.
(2), rammed piles: Unit: m3
V1 (once or twice rammed) = standard tube diameter cross-sectional area × design rammed feed length (not including precast pile tip )
V2 (the last infusion of concrete pipe) = standard tube diameter cross-sectional area × (design pile length +0.25)
designed rammed feed length - calculated according to design requirements.
(3) holes drilled into the concrete pile
quantities, units of measurement: m3
drill hole V = pile diameter soil cross-sectional area × the natural ground to the depth of the rock surface; ;
rock drill hole V = pile diameter depth into the rock cross-sectional area × degree
quantities of concrete poured into the units of measurement: m3 V = cross-sectional area of the pile diameter × effective length, effective length design provisions required, no provision by the following formula:
effective length = design pile length (including the length of the pile tip) + pile diameter
design pile length - top of the pile to the pile bottom elevation elevation
based super filling length - be calculated according to design requirements.
the amount of mud and Transportation Engineering: Unit: m3, construction volume is based on accrual hole quantities.
eight, hand-dug pile
(1), the amount of manual digging works: Unit: m3
V (manual digging) = Wall peripheral hole cross-sectional area × length ; hole length - a natural floor to the design of pile elevation
V (mud, quicksand, rock) = actual excavation (digging) the amount of
(2) brick,
【Who is finishing the tutorial, so strong!, concrete Wall and Bored volume of concrete core: Unit: m3 quantities according to the design size of the actual size of the icon
nine, cement mixing pile, pile, in cubic meters
V = (design of pile length +500 MM) × design of pile cross-sectional area (length of the design if the design requirements stated at length.) Axis of Quantities shall not be double counting, the overlap between the group piles is not deductible.
ten, long spiral or rotary bored pile method to cubic meters
V = (design pile length +500 MM) × cross-sectional area or spiral design pile diameter area (the length of any design requirements stated at the design length).
XI Shotcrete Wall foundation hole and the hole grouting.
according to design drawings to extend the twelve
in meters, Wall
sprayed concrete according to design drawings in square meters.
XIII brick basis rules
1, base and wall (pillar) of the division:
(1) foundation and the wall (column) in the body when using the same kind of material to design the indoor surface for the community (those who have basements, the basement floor for the interior design profession
), the following is based on the above for the wall (column) body.
(2) foundation and walls of the use of different materials, in the interior design of the ground? 300MM or less, the dividing line between different materials, more than? 300MM when the ground is to design the indoor boundary.
(3) brick, stone walls, in order to design an outdoor terrace for the line, the following is based on the above for the walls.
2, brick-based calculation (the meter rule)
(1), regardless of wall thickness and height of the brick base, calculated by the icon size to m3. The basis of the length of which: external wall of the base at the center line of the external walls of calculation; interior wall of the base at the top step of the base walls of net long-term calculations.
(2) does not deduct the part: big release based on T-joint of the foot overlap, embedded base of steel, iron, pipes, basic vapor barrier, within a single area of 0.3m2 holes the size of a , but the wall does not increase the heating groove overhangs. Qiangduo wide basis with a part of the amount of volume should be included in the basic project.
(3) should be deducted parts: an embedded base of reinforced concrete ring beam and column to the size of plates and
(4) foot brick base big release engineering calculation: the basis of general common brick form for the shape of the ladder, each step outward layers of fixed size stack out, commonly known as the place foot basis. According to the form of a large section of the foot into place: Large put feet high and put big-foot intervals. Great place for simple foot brick base the calculation of quantities can be folded into the area put the foot part of the same base of a wall section of the area. In general, we can start conversion conversion table found high increase in cross-section calculation again.
big release pin is calculated as: large quantities = put foot basis based on the length of the base × wall thickness × (height + based on converted height)
fourth, brick masonry construction project of implementation of calculation Rules
1, the calculation method and formula: thickness of the wall and should distinguish between different types of masonry mortar to m3 calculation. Wall volume = (length × wall height of the wall - an area of window and door openings) × thickness of the wall - embedded in the wall of reinforced concrete column, beam, lintel sizes + brick stack, parapets and other volume
2 shall be deducted parts: door and window openings, extraordinary holes, empty circle, embedded in the walls of reinforced concrete column (such as GZ), beam (GL, QL, etc.), reinforced brick lintels, niches such as the volume of heating package.
no deductions: beam head, both inside and outside wall head, purlin wood, skids, wooden flute head, along the rafters, wood tiles, doors and windows take the head, the reinforced walls, wood bar, Iron, steel pipes, each of these holes and other percentage in volume of 0.3m2.
not increase for some: tiger bay windows projecting brick wall, top line, gable flashings, chimneys, roots, door and window sets, three less than the waistline and leather brick overhangs equal volume;
3, to determine the length of the wall: wall length of the outer wall of the center line by calculation, according to interior walls of the net length of long-term calculations.
4, wall height to determine
(1),
new new balance shoes, external wall height
① ceiling sloping roof eaves were not counted until the end wall of the center line of roof, as shown in Figure 1 No roof, considered to the top rafters, as shown in Figure 2.
② a roof, ceiling and indoor and outdoor are those considered to truss bottom chord plus 200mm; no ceiling to the roof truss bottom chord at the end were counted plus 300mm, as shown in Figure 3.
③ There situ reinforced concrete slab floors, shall be counted to the flat bottom.
(2), interior walls of the roof height
① in the last Quarter, the height calculation to the roof at the end. Figure 4
② no roof who is counted until the end of the ceiling plus 120mm. Figure 5
③ compartment floor there were reinforced concrete, considered to the plate bottom. A frame beam, that is infilled frame should be counted to the bottom frame beam.
(3), inside and outside the gable wall height according to their average height calculation. Figure 6. Parapet wall beam height from the daughter board to the top of the wall surface of the surface operator (if any concrete pressure when the operator to press the top of the top of the lower surface)
fifth, the frame structure infilled frame engineering calculation rules
between the masonry, the clearance between the frame beam area multiplied by the thickness calculation. Xiangtie brick exterior part of the framework should be incorporated into the framework of the quantities calculated within masonry between
XVI empty Huaqiang, Cavity Wall engineering calculation rules
empty wall displaying dimensions in m3 by calculation take part without deduction of air, air to spend a solid masonry wall, in which part of the real puzzle to be calculated m3. Cavity Wall calculated according to dimensions in m3. Partially empty net
seventh bucket, brick wall construction brick wall calculation rules in order to design icons
length multiplied by height in m; the design height of the fence to the outdoor floor tiles top. If the top surface for the tile roof tiles were pressed, count to pressure Dingding surface; top of those without pressure, calculated to the top surface of the wall; such as the top pressure is calculated for the concrete to the top and bottom pressure.
eighth, brick walls, hollow brick engineering calculation rules
thickness as shown m3 basis, without deduction of the hole, the hollow part of the volume.
nineteenth,
Woman and mature man with - Qzone log, masonry engineering calculation rules
aerated concrete wall, silicate brick wall, hollow block walls, and so, according to the icon size to m3 calculation block hollow part of the volume itself is not deductible. Design requirements needed by the body part of the mosaic of brick, is included within the fixed, without any additional calculations.
twenty, garbage Road, flue,
new balance running shoes, ventilation channel, with a wall of the chimney and other engineering calculation rules
by appearance of volume, are embedded into the wall volume. Cross-section of each hole without deducting the following in the 0.1m2 volume, but the pores do not increase the amount of plastering projects
the twenty-first, brick columns engineering calculation rules
volume in real puzzle to m3 calculated applying the appropriate column based on basic items.
XXII other masonry engineering calculation rules
(1), brick steps (not including ladder) at the level of the projected area in square meters.
(2), brick door squatting, housing on the chimney, the ridge of the wall, sink, sink legs, litter bins, a low wall on the steps, flower bed, coal boxes, bins, the volume within the three cubic meters pool, toilet tank, including still, balcony railing, etc. in real puzzle volume to m3 terms, apply a small masonry project.
(3), the trench: the Ministry of big brick wall and the trench wall base, it should be combined volume calculated in cubic meters.
(Zhou Feng for the draft)
Figure 1 Figure 2 Figure 3
Figure 4 Figure 5 Figure 6
xxiii, steel projects procedures to calculate
(1), to determine the strength grade of concrete structures and seismic levels; (2) to determine the thickness reinforcement; (3), calculate the length of the Bar Anchorage La, seismic anchorage length Lae, reinforced The lap length Ll, seismic lap length Lle; (4), the next of Reinforced material length and weight (5), according to different diameter and steel components were cast reinforced aggregate weight (6), using standard calculations or check Atlas to determine the weight of prefabricated steel; (7), according to different kinds of steel are summarized in diameter and weight of
round reinforced precast, reinforced the basic calculation rules quantities and formula
(1), calculation rule: the amount of reinforcement works should distinguish between the different steel types, species and diameter of steel in tonnes (t) to calculate the weight.
(2), the formula: volume = steel reinforcement works blanking length (m) × corresponding reinforcement weight per meter (kg / m)
where: steel cutting length (m) ; = component icon size - reinforced concrete protective layer + + bent steel hooks bent to increase the length of some of the increase in length - measured deviation (bending to adjust the value) + map overlap length has been specified
Figure 1
XLI, ground floor, project engineering calculation rules and formulas
(a), the ground cushion
calculation rule: according to the indoor wall thickness between the clearance area by design to m3 Jisuan . Should be deducted: protruding ground structures, equipment foundations, interior railways, such as the size of a trench. Without deduction of: column, stack, wall partitions, with a wall of the chimney and the area within the holes in the occupied area of 0.3m2. However, openings, empty circle, the opening part of the niche is not increased. ≥ 120mm main wall means the wall thickness of the wall.
(b), the overall surface, leveling layer
calculation rule: According to the main wall area in square meters between the clearance. Should be deducted: protruding above ground structures, equipment foundations, indoor pipes, trench and other occupied area. Without deduction of: column, stack, wall partitions, with a wall of the chimney and the area of 0.3m2 holes within the occupied area, but the openings, empty circles, heating bag slot, the opening part of the niche is not increased.
(c), block material surface layer
calculation rule: the icon size by actual shop area in square meters, the ground should be less prominent places do not do surface, openings, empty circle, Heating packet slots and niches into the opening portion of the corresponding quantities calculated within the surface layer.
(d), the staircase surface
calculation rule: the stairs the whole surface (including still and rest platforms and stairwells is less than 200mm wide) at the level of projected area calculation. Staircases and corridors connecting to port beam along the outer edge of the stairs as the boundary, the line within the staircase area, the line outside the corridor area. Block of material surface layer at the stairs to start implementation of shop floor area.
(e), steps
calculation rule: the whole surface level (including no progress and no progress along the top layer of 300mm) at the level of projected area of the block started by the surface layer material (including both sides) Shop area of real.
(f), baseboards
calculation rule: cement mortar, terrazzo skirting board by extension in meters, hole, empty lap length shall not be deducted, the hole, empty circle, stack, chimney wall with the wall length does not increase; block material surface size as shown baseboard to extend the rice paste real terms, net of openings, wall increases.
(g) bulk water, non-slip ramp
calculation rule: Press the icon size in square meters. The formula is: S = (L +4 * bulk water outside width - height, flower beds, the length of bulk water stations, etc.) * bulk water width.
(h), balustrades, handrails
calculation rule: railings, handrails, including elbow length in meters by extension. The formula is L = (stair treads horizontal projection length * 1.18 0.15 * 2 * 1.18 + stairwell width) * 2 * staircase treads layers + the width of the top of a forty
wall cylinder Project engineering calculation rules and formulas
(a), calculated within the wall plaster
rule: by the wall space, should be deducted: door and window openings and the area occupied by an empty circle, no Less: skirting boards, hanging mirror line, 0.3m2 holes within the wall area of the junction with the components; not increase: the hole plaster wall and the top surface area is not increased; should be combined: Qiangduo and wall area should be attached to the chimney wall quantities into the plaster walls.
take into account the size plaster walls: the length of the wall plaster to the main wall (wall thickness ≥ 120mm) between the size of the icon of net long basis, without deducting the area occupied by partitions. Emulated as the height for the interior surface (floor) to the underside of floor or ceiling between the distance.
(b), the outer wall plaster
calculation rule: by the outer wall of the vertical projection area in square meters. Should be deducted: door and window openings, external wall panels and holes occupied area greater than 0.3m2. Should be incorporated: door and window openings, wall with Qiangduo, beams, columns side of the plaster into the area outside the developed area should be the structure of quantities calculated within the wall plaster.
railing, railings, window lines, windows and doors sets, handrails, top, overhangs, sun visor, etc. The other calculation rules according to the corresponding terms are to start area of structure size, waist line and the connection window, and calculated into the waist. Balcony, awning by horizontal projection area of plaster, fixed is included in the top, side and all the plaster corbel area.
(c), wall pointing
calculation rule: calculated by the vertical projection area. Should be deducted: wall panels and the plaster along the waist and pick area. No deduction for: door and window openings, door and window sets, and so the area occupied by scattered plaster. Does not increase: a report of Qiang Zhu, and door and window openings on the side of pointing area.
xliii, project engineering calculation cylindrical wall of rules and formulas
(d), Xiangtie material surface layer and the granite block (marble) plate hanging paste
1, the outer wall, pillar surface, scattered blocks of the project Xiangtie surface material according to the building block material surface size (each block mortar material thickness of the surface layer + paste = 25mm) area calculation. Net area of window and door openings, wall, with a stack of veneer should be included in the amount of wall works. Figure 1.
Figure 1, door and window openings and plaster wall hanging diagram in Figure 2 attached sheets of granite cylinder diagram
2, granite, marble mortar, paste, paste link building surface according to size ( including hanging space, mortar, board thickness) to start space, as shown in Figure 2.
3, bay windows, waist, doors and windows sets, gutter, cornice, bathroom sink, the pool feet Xiangtie surface materials such as blocks, are to start building size area (including the mortar and block material surface layer thickness ) calculated by sporadic projects.
(e) wall, pillar wood surface decoration wooden decoration
keel, linings, surface layer and paste the section net area of plate, and door and window openings and less than 0.3 square meters area occupied by holes, sidewall, with a stack of veneer wall should be incorporated into the calculation of quantities.
(f) Calculation of glass curtain wall glass curtain wall to frame the rules
external space, wall and building top, both ends of the edge size in square meters by the icon. The level of the natural layer of isolation and connection by extending the building in meters (link layer including the upper and lower, including galvanized steel).
xliv, ceiling engineering calculation rules and formulas
(a) of the ceiling plaster works. Press Review of the main wall between the ceiling space, not less septal wall, pile, pillar, with a wall of the chimney, check the port and pipe area to be occupied; ribbed beam, cross beam, with beam ceiling, plaster on both sides of an area of beam , incorporated into the calculation of the amount of ceiling plaster work, inclined at oblique area of ceiling plaster.
ceiling plaster, such as wiping a small corner who has been included in the scale of labor, materials, machinery increased by a fixed note content; such as those with a decorative line, three lines or less, or five lines or less extended in meters by (line angle of the road with a number of prominent edges and corners as a line.) Figure 3.
Figure 3 ceiling decoration line
bottom of the stairs, the horizontal underside of the sun visor and the cornice plaster ceiling, plaster ceiling into the appropriate engineering calculation. Line in the ceiling, light trough, arc-shaped line, arched lines and other art forms by expansion area of plaster.
(b), ceiling finishes works. Various ceiling keel ceiling between the main wall by the horizontal projection of space, not less septal wall, check the hole, with a wall of the chimney, column, stack and pipe area occupied.
ceiling surface and finishes, according to a net area of the main wall, not less septal wall, checkpoints, with a wall of the chimney, stack and pipe area occupied, but the holes should be less than 0.3m2, independent column , light tank and connected with the ceiling area to be occupied Chuanglian.
forty-five, doors and windows of the main calculation rules and formulas
1, aluminum doors and windows, color plates Corner windows and doors,
new balance sneakers, steel doors and installed according to the hole area in square meters. Purchase of finished wood door installation doors at the net area of purchase.
2, the installation of various types of wood windows and doors production volume by area in square meters door and window openings.
3, even the doors and windows of quantities should be calculated separately, apply the appropriate doors, windows fixed, the width of the window operator to the door outside.
4, frameless windows at the periphery area of fans.
5, Volume entrance gate installed at their door height plus 600MM multiplied by the actual width in square meters. Electrical installations in order to set terms, rolling shutters installed on the door to fans calculations, the small door area should be deducted.
6, doors and windows fan package galvanized iron sheet, press the door and window openings area in square meters; door window frame package galvanized iron sheets, nails rubber band, nail blankets size window and door openings as shown to extend in meters.
7, the door window frames, stainless steel plate of stainless steel plate according to the expansion area in square meters. Wood doors metal surface or on the package of noodles are soft net area of the doors.
8, ordinary doors and windows of the upper part of a semi-circular windows are, respectively, in the normal quantities should be semi-circular window and the window calculation, the calculation of ordinary semi-circular window and the window frame between the horizontal edges for the sector. Figure 1.
9, frameless glass door area of their holes, some of which fixed the door, which part is opening the door, the project amount should be calculated separately.
xlvi, paints, coatings, wall paper works mainly engineering calculation rules and formulas
1, ceiling, walls, columns, beams surface spray (brush) paint, latex paint and plaster surfaces wall paper works, its works in real volume spray (brush) space, but not less holes within an area of 0.3 square meters.
2, various quantities of wood surface of the paint component quantities were multiplied by the corresponding coefficients.
Figure 1 with semi-circular window to indicate 3, the metal component by component quantities of paint weight
4, fixed in the wall, Wall, column, ceiling and wood flooring in the wood keel wooden keel with a gross floor brush Fanghuo Qi engineering calculation rules are as follows:
1). Wall, Wall wood keel its projected surface area of the fa?ade.
2). Column wooden keel area of its external surface.
3). Ceiling wood keel area of its horizontal projection.
4). Wood flooring in the wood keel with keel and gross floor by floor space.
5), wall, Wall, columns, ceiling and wooden floor surface brush Fanghuo Qi, Fang Huoqi perform other wood surfaces corresponding subheading brush.
5, plaster face paint, paint, brush plaster slurry quantities = quantities
Forty-seven, sporadic works mainly calculation rules and formulas
1, flat signs grassroots by area of the fa?ade, light box surface area in square meters by expansion.
2, along the awning, cornice or balcony to primary vertical signs, graphic signs by complex implementation, should be developed area calculation.
3, box-type steel signs of grass-roots, according to the external volume calculation. Highlight the lighting outside the box, logo and other art decoration shop Dengjun be calculated.
4, steel-framed billboard amount calculated in tonnes, according to the design.
Forty-eight, building ultra-high increase in cost engineering calculation rules and formulas
1, the building super stingy fees in excess of 20m high canopy part of the floor area in square meters. The building floor height of more than 20m by the time the floor area of high increase in construction costs.
2, building eaves height exceeds 20m, but the highest floor level or one level does not exceed 20m, then the some 20 meters above the floor can only be calculated for each increase of 1 meter storey increase fees.
3, when more than 3.6 m storey buildings, each increase of 1 meter (less than 0.1 m by 0.1 m terms) the purpose by the appropriate sub-20%, and increased in proportion with the height.
4, the same building there are two or more than 2 different eaves height, because each section at different height of the building area of applied vertical scale.
5, a separate part of the decoration of artificial high efficiency to more than 20 meters lower part of the labor costs calculated
Forty-nine segments, the installation of the meter main formula
1, regardless of how many times the transformer oil filter until the filter pass until the 2, with a shaped bus formula: L = Σ (calculated according to the individual drawings extend the length of m + bus reserved)
3, based on the installation length of the channel angle calculated according to design drawings, no provisions calculated as follows: ① When a single cabinet panel: L = 2 (A + B) ② more with the specifications of the cabinet, when the disk is connected to: L = n2A +2 B where: L: A length of the request : the width of the cabinet or panel B: the thickness of the cabinet or panel n: the number of cabinet or screen.
4, enclosure wiring length formula: L = plate half-cycle counter board Wiring length × number.
5, cable installation calculation formula: L = Σ (horizontal vertical length + length + length of all reserved) × (1 +2.5% more than the cable bending twists and turns coefficient).
6, cable protection tube formula: across the road: L = roadbed width +4 m; through the drains: L = outer +1 m trench wall; vertical laying: nozzle +2 m above the ground; through the external walls of buildings, as base +1 meters outside the outer edge.
7, power cable reference formula to determine the number of intermediate head: n = L/l-1 n: the middle of the first number of L: the length of the cable design l: the average length of each cable.
8, grounding busbar, lightning protection cable laying capacity formula: L = Σ (length + construction design standards vertical length) × (1 +3.9% additional length).
9, wearing a wire in electrical engineering with the amount of tube formula: L = (length + piping length of wire reserved) × number of roots with the Section Line .
10,10 KV overhead line conductor set up the following formula quantities: L = (total length + length of all reserved) × wire root number.
11, duct fabrication and installation of the construction plans Expand area shows calculated according to different specifications, not less inspection holes to determine hole, outlet, suction outlet and other occupied areas. tube F = π × D × L where F - round air duct areas ( to m2 as a unit); D - diameter of round duct; L - length of pipe centerline. rectangular duct as shown by multiplying the circumference of pipe centerline length calculation
12, rust, brush the oil project. (1) device cylinder, pipe surface area formula: S = π × D × L where π - pi; D - equipment or pipe diameter; L - equipment or pipe extension tube meters high.
(2) the valve surface area formula S = π × D × 2.5D × K × N where D - diameter; K- -1.05; N - the number of valves.
(3) bend the surface area formula S = π × D × 1.5D × K × 2π × N / B where D - diameter; K - 1.05; N - the number of elbow; B value obtained as: 90 ° elbow B = 4; 45 ° bend B = 8.
(4 ) flange surface area calculation formula: S = π × D × 1.5D × K × N where D - diameter; K - 1.05; N - flange number.
( 5) anticorrosion equipment and pipe flanges flanging calculation type: S = π × (D + A) × A where D - diameter; A - flange flange width.
(6 ) with the head of the equipment corrosion (or brush oil) engineering calculation type: S = L × π × D + (D [] 22) × π × 1.5 × N where N - the number of head; 1.5 - coefficient.
13, the amount of insulation works. (1) device cylinder or pipe insulation, moisture and the protective layer formula: V = π × (D +1.033 δ) × 1.033δ
S = π × (D +2.1 δ +0.0082) × L where D - diameter 1.033,2.1 - the adjustment factor; δ - thickness of insulation layer; L - tube or pipe equipment long; 0.0082 - bundled wire diameter or steel thickness.
(2) with the amount of thermal insulation engineering formula: ① single tube or double pipe heating with heat (the same diameter, clip when the angle is less than 90 °). D '= D1 + D2 + (10 ~ 20mm) where D'- with heat pipe integrated value; D1 - the main channel diameter; D2 - with heat pipes diameter; (10 ~ 20mm) - Head Road and the gap between the heating pipes. ② double pipe with heat (the same diameter, angle greater than 90 °,). D '= D1 +1.5 D2 + (10 ~ 20mm) ③ double pipe with heat (different diameter, angle of less than 90 °,). D '= D1 + D with a large + (10 ~ 20mm) ; where D'- with heat pipes integrated value; D1 - the main channel diameter. to the D 'results were substituted into the appropriate formula to calculate the heating pipe insulation, vapor barrier and protective layer works volume.
(3) head equipment insulation, moisture and the protective layer engineering calculation type. V = [(D +1.033 δ) / 2] 2 π × 1.033δ × 1.5 × N S = [(D +2.1 δ) / 2] 2 × π × 1.5 × N (4) valve insulation, moisture-proof layer of protection formula. V = π (D +1.033 δ) × 2.5D × 1.033δ × 1.05 × N ; S = π (D +2.1 δ) × 2.5D × 1.05 × N
(5) Flange insulation, moisture-proof layer of protection formula. V = π (D +1.033 δ) × 1.5D × 1.033δ × 1.05 × N S = π × (D +2.1 δ) × 1.5D × 1.05 × N
Wife namely one angel
Linear Mode
