Some standard content:
National Standard of the People's Republic of China
Standard for structural drawing
Standard for structural drawing drawingsGB/T50105--2001
Editing department: Ministry of Construction of the People's Republic of ChinaApproving department: Ministry of Construction of the People's Republic of ChinaEffective date: March 1, 2002
Notice on the release of six national standards including "Uniform Standard for Building Drawings"
Construction Standard [2001] No. 220
According to the requirements of the Ministry of Construction's "Notice on Issuing the 1998 National Standard Formulation and Revision Plan (Second Batch)" (Construction Standard [1998] No. 244), the Ministry of Construction, together with relevant departments, jointly revised six standards including "Uniform Standard for Building Drawings". After review by relevant departments, the "Uniform Standard for Building Drawings" G13/T50001--2001, "General Drawing Standard" GB/T50103-2001, "Architectural Drawing Standard" GB/T50104-2001, "Architectural Structure Drawing Standard" GB/T50105-2001 and "Architectural Structure Drawing Standard" GB/T50106-2006 are now approved. 0105-2001, "Water Supply and Drainage Drawing Standard" G/T50106-2001 and "HVAC Drawing Standard" GB/T50114-2001 are national standards and have been implemented since March 1, 2002. The original "Housing Construction Drawing Unified Standard" GHJ before
According to the task issued by the Ministry of Construction's document No. 244 [1998] "Notice on Issuing the 1998 National Standard Formulation and Revision Plan (Second Batch) for Engineering Construction" , the drafting group of this standard revised the "Standard for Building Structure Drawing" (G3I105-87). The drafting group first proposed a draft for comments based on the feedback collected in 1990, and widely solicited opinions from the whole country, and then proposed a draft for review, which was then approved by letter review and expert review, so that it has a good mass base. The purpose of revising this standard is:
, the relevant national standards in "Technical Drawing" issued and implemented since 1990 (including ISOTC/10 1-6-2
1-86, "General Drawing Standard" GBJ103-87, "Architectural Drawing Standard" GBJ104-87, "Architectural Structure Drawing Standard" GHI105-87, "Water Supply and Drainage Drawing Standard" GBJ106--87 and "HVAC Drawing Standard" GBJ114-8 8 At the same time, the standard is abolished. The Ministry of Construction is responsible for the management of this standard, the China Building Standard Design Institute is responsible for the specific interpretation, and the Standard and Quota Research Institute of the Ministry of Construction organizes the China Planning Press to publish and distribute it.
Ministry of Construction of the People's Republic of China
October 1, 200-
3. The legends, expressions and drawing rules that are not suitable for current use or are outdated have been modified, deleted or supplemented to make them more in line with actual work needs:
This standard is a recommended national standard.
This standard is interpreted by the China Building Standard Design Institute. If there is a need for modification or supplementation during the application process, please send your opinions or relevant information to the institute (No. 19 Chegongzhuang Street, Xiwai, Beijing, Postal Code 100044) for reference during revision. The editorial unit, participating units and main drafters of this standard are as follows: Editorial unit: China Building Standard Design Institute Participating units: Baotou Iron and Steel Design and Research Institute Main drafters: Chen Xueguang Zhang Ruihua
General provisions
Concrete structure
3.1 General representation method of steel bars
3.2 Simplified representation method of steel bars
--6--4
-6—4
1--6—5
1—6--5
........ 1-67
3.3 Representation method of embedded parts and reserved holes 4
Steel structure
Marking method of commonly used steel sections
...... 1—6--7
1--6-
1--6-8
Methods for indicating bolts, holes, and electric rivets…1--6-—84.2
Methods for indicating commonly used welds…
4.4 Dimensioning
Wood structures
......... 1-68
....... 1—6-9
*. 1—6—10
Methods for indicating commonly used cross sections of wood members…． —6—105.1
5.2 Methods for indicating connections of this member
Appendix A Codes for commonly used members
Explanation of terms used in this standard
....... 16-10
.... 1--6—11
1-6—11
16—3
1.0.1 This standard is specially formulated to unify the drawing rules of building structure specialty, ensure the drawing quality, improve the drawing efficiency, make the drawings clear and concise, meet the requirements of design, construction and archiving, and meet the needs of engineering construction. 1.0.2 This standard meets the basic provisions of building structure specialty drawing and is suitable for drawings drawn by the following drawing methods in engineering drawing:
Manual drawing;
Computer drawing
This standard is applicable to the following engineering drawings of building structure specialty: design drawings and completion drawings of each stage of new construction, reconstruction and expansion projects; actual measurement of existing buildings and structures 3 General design drawings, standard design drawings.
1.0.4 In addition to complying with this standard, professional drawings of building structures shall also comply with the provisions of the "Housing Architectural Drawing System-Standard" (GB/T50001-2001) and the relevant mandatory standards currently in force in the country.
2 General provisions
Drawing line width b shall be selected in accordance with the provisions of "Drawing Lines" in the "Housing Architectural Drawing System-Standard" (GB/500012001). 2.0.2 Each drawing shall first select an appropriate basic line width and then select the corresponding line width group according to the complexity and scale.
2.0.3 Professional drawings of building structures shall select the lines shown in Table 2.0.3. Table 2. . 3 Figure
Midpoint long sense line
Point-based line
Dismantling line
Wave line
Use
Screw peak, main reinforcement line, single-line structural member line in the structural plane, steel support and tie line, horizontal line under the sun, cutting line
Additional wheel nose line, basic wheel health line, steel and wood structural wheel health line, push reinforcement line, plate reinforcement line visible in the structural plane and detailed section
Wheel line of reinforced concrete components visible in the river, ruler line, mark lead-out line, elevation symbol, element reference symbol invisible toughness tie line, invisible single-line structural member line and system and basic support line in the structural plane Invisible components in the drawing, plain line of wall skin steel, offline line of wooden components
Pipe line in foundation plan, invisible reinforced concrete component line
Indirect support, vertical support, center line of equipment support axis drawing
Positioning axis, symmetry line, center line
Prestressed steel bar line
Source joint contour line
Break boundary line
Break boundary line
In the same drawing, drawings of the same scale should use the same line width group 2.0.4
When drawing, according to the purpose of the drawing and the complexity of the object being drawn, the common proportions in Table 2.0.5
2. 0. 5 should be selected. In special cases, available proportions can also be selected. 1—6—4
Tree plan
Foundation plan
Circular beam planGeneral plan
Central pipe trench, underground facilities, etc.
Table 2, 0. 5 ratio
Common ratio
150:1co
1 [,1: 200
1+2l,1: 50:
1: G.1: 20
What ratio to use
1 : 34
1 125.1: 4
2.0.6When the longitudinal and transverse sections of a component have very different sizes, different proportions can be used for the longitudinal and transverse sections in the same detailed drawing. The axis size and component size can also be drawn in different proportions.
2.0.7 The name of the component shall be indicated by a code, followed by Arabic numerals to indicate the model or number of the component, or the serial number of the component. The serial number of the component shall be arranged in a continuous pattern of Arabic numerals without superscripts. For commonly used component codes, see Appendix A. 2.0.8 When using components from a standard or general atlas, the code or model specified in the atlas shall be used.
2.0.9 The structural drawing should be drawn by orthographic projection (Figure 2.0.91, Figure 2.0.92). In special cases, it can also be drawn by upward projection. BKB-
Figure 2.0.91
k2la.kB21
Drawing the structural plan by orthographic projection
Figure 2.n.9-2 Detailed drawing of nodes
榛喝间
2.0.10 In the structural plan, the components should be represented by contour lines. If they can be clearly represented by single lines, they can also be represented by single lines. The positioning axis should be consistent with the building plan or general plan, and the structural elevation should be marked.
2.0.11 In the structural plan, if ten parts are the same, only part can be drawn, and the classification symbol of the same part can be represented by capital letters (AB,.) plus a thin solid circle. The diameter of the classification symbol circle is 8mm or 10tnm. Other identical parts are only marked with classification symbols.
2.0.12 The geometric dimension drawing of the truss structure can be represented by a single-line diagram. The axis length dimension of the member should be marked on the top of the member (Figure 2.0.12). A
Figure 2.0.12 Method of marking geometric dimensions of symmetrical analysis
2.0.13 In the single-line diagram of a truss with symmetrical arrangement and force, if necessary, the geometric axis dimensions of the member can be marked on the left half of the truss, and the internal force and reaction values of the member can be marked on the right half; for asymmetric truss single-line diagrams, the geometric axis dimensions of the member can be marked on the top, and the internal force and reaction values of the member can be marked on the bottom. The geometric axis dimensions of the vertical bar can be marked on the left, and the internal force values can be marked on the right. 2.0.14 The numbering sequence of the section drawing and cross-section detail drawing in the structural plan should be arranged according to the following provisions (Figure 2.0.14):
1 The exterior wall is numbered from the lower left corner in a clockwise direction; 2 The interior transverse wall is numbered from left to right and from top to bottom; the interior longitudinal wall is numbered from top to bottom and from left to right3
2.0.15 When the component detail drawing is long in the longitudinal direction and has many repetitions, it can be broken by a break line and the repeated part can be appropriately omitted.
2.0,16 The drawing name in the drawing or title bar should accurately express the content of the drawing and the drawing composition, and be concise and clear.
Figure 2.0.14 Section numbering sequence in the structural plan drawing 3 Concrete structure
3.1 General representation method of steel bars
3.1.1 The general representation method of steel bars should comply with the provisions of Table 3.1.1-1 to Table 3.1.1.4.
Table 3.1.I-1
General steel reinforcement section
No uniform reinforcement
Gradual reinforcement with semicircular hook
Steel reinforcement with temporary reinforcement
The most common reinforcement of the steel bar with threaded buckle
The following figure shows the long and short reinforcement
When the projection is heavy, the reinforcement
is shown with 45\.||Typical overlap with straight joint
Disc thread reinforcement joint
Reinforcement joint connected by machine
Continued Table 3.1.I-1
Table 3.1.1-2 Prestressed steel bars
Prestressed steel bars
Post-tensioned steel bars
Unbonded prestressed steel bars
Single-strength stress-relief bars
Tension bars
Fixed end bars
Stitched bars
Fixed joints
Table 3.1.1-3 Steel mesh
|Plane plan of steel mesh
Plane plan of steel mesh with alternating rows
Note: The text shall be used to describe welded mesh or tied mesh, and the text shall be used to describe the method of mechanical connection (or punching, pressing, threading, etc.)
Table 3.1.1-4 Copper alloy joints serial number
Special joints welded on one side
Example of double-sided welded steel bar joint
Example of welded joints by adhesive bonding
Head type
Method
1—65
Rebar joint welded by double-sided welding
Example of butt welding
(Flash welding, pressure welding)
Flat-welded steel bar joints
|Connected by steel or fan
Steel joints welded by plate
Rebar or bolts and steel plate through-hole plug welding
Continued Table 3, 1. 1-4
Head type
The drawing method of steel bars shall comply with the provisions of Table 3.1.2 Table 3.1, 2. Surface method of steel bars When double-layer steel bars are arranged in the structural plan A, the hook of the bottom layer steel bars should be upward or left, and the hook of the second layer steel bars should be downward or toward (bottom layer). When double-layer steel bars are arranged on the wall, in the surface of the steel bars, the narrow hook of the surface steel bars should be bent downward or toward (JM surface: YM surface). It is recommended that the steel layout that cannot be clearly shown in the section drawing should be added outside the section drawing (such as sick concrete reinforcement, floor, etc.) |If the layout of the steel bars, ring bars, etc. shown in the figure is complicated, the steel bar sample and description can be added. Each group of alternating steel bars, steel bars, or ring bars can be represented by a thick solid line, and one or two short dashes can be used to represent the remaining steel bars and the starting and ending ranges.
—6—6
Marking method
((Top layer)
3.1.3 Steel bars, steel wire bundles and steel meshes shall be marked in accordance with the following provisions: The description of steel bars and steel wire bundles shall give the code, diameter, quantity, spacing, 1
number and location of the steel bars, and the description shall be marked along the length of the steel bars or on the lead-out line of the relevant steel bars.
2 The number of the steel mesh shall be marked on the diagonal line. The number of meshes should be marked together with the mesh number (Table 3.1.1-3 No. 2). Note: Simple components and fewer types of steel bars may not be numbered. 3.1.4 The method of indicating steel bars in the plane, elevation, and cut (section) surface shall comply with the following provisions:
1 The configuration of steel bars in the plane drawing shall be indicated in accordance with the method shown in Figure 3.1.4-1. When there is not enough space for steel bar marking, leader line marking may be used. The oblique short dash line of the leader line marking steel bar shall be a medium solid line or a thin solid line. 2 When the component layout is relatively simple, the structural plan layout drawing may be drawn together with the plate reinforcement plan drawing.
Centimeter 12@15
Figure 3.1.4-1 Method of indicating steel bars in the plane drawing 3 When the configuration of steel bars in the plane drawing is relatively complex, it may be drawn in accordance with the method of No. 5 in Table 3.1.2 (Figure 3.1.4-2).
Figure 3.1, 4-2 The layout of the slab reinforcement is more complicated. The configuration of the steel bars in the elevation and section drawings should be indicated according to the method shown in Figure 3.1.4-3.
Reinforcement diagram of Figure 3.1.4-3
3.1.5 The length dimension of the stirrup in the member reinforcement diagram should refer to the inner dimension of the stirrup. The height dimension of the bent steel bar should refer to the outer dimension of the steel bar (Figure 3.1.5). Rebar dimensioning method
(c) Circular steel bar dimensioning diagram
b] Spiral steel bar dimensioning diagram
(d) Spiral steel bar dimensioning diagram
Figure 3.1.5 Steel bar dimensioning method
3.2 Simplified representation method of steel bars
3.2.1 When the member is symmetrical, the steel mesh can be represented by half or 1/4 (Figure 3.2.1). 10
Figure 3.2.1 Simplified reinforcement diagram
3.2.2 When the reinforcement of reinforced concrete components is relatively simple, the reinforcement plan diagram can be drawn according to the following provisions:
Independent foundation In the lower left corner of the plane template diagram, draw a wavy line, draw the steel bars and mark the diameter and spacing of the steel bars (Figure 3.2.2a). 2 For other components, draw a wavy line at a certain position, draw the steel bars and mark the diameter and spacing of the steel bars (Figure 3.2.2b). O
3. 2. 2 Simplified reinforcement diagram
3.2.3 Symmetrical reinforced concrete components can be drawn in the same drawing with half of the template and the other half of the reinforcement (Figure 3.2.3)
Figure 3. 2.3 Simplified reinforcement diagram
3.3 Methods for displaying embedded parts and reserved holes 3.3.1When embedded parts are set on concrete components, they can be indicated on the plan or elevation. The lead line points to the embedded parts and the embedded part code is marked (Figure 3.3.1). M-
Figure 3. 3. 1 Method of indicating embedded parts 3.3.2When the same embedded parts are set at the same position on the front and back sides of a concrete component, the lead line is a solid line and a dotted line and points to the embedded parts. At the same time, the number and code of the embedded parts are marked on the lead horizontal line (Figure 3.3.2) 3.3.3When embedded parts with different numbers are set at the same position on the front and back sides of a concrete component, the lead line is a solid line and a dotted line and points to the embedded parts. The code of the embedded part on the front side is marked on the lead horizontal line, and the code of the embedded part on the back side is marked under the lead horizontal line (Figure 3.3.3). Figure 3.3.2 Method of indicating that the embedded parts on the front and back sides of the same position are the same Figure 3.3.3 Method of indicating that the embedded parts on the front and back sides of the same position are different 3.3.4 When a reserved hole, a hole or a pre-embedded casing is set on a component, it can be indicated in a plane or cross-sectional view. The lead-out line points to the reserved (embedded) position, and the size of the reserved hole or hole and the outer diameter of the pre-embedded casing are marked above the lead-out horizontal line. The center elevation or bottom elevation of the hole, hole (casing) is marked below the horizontal line (Figure 3.3.4).
bx(,DN)
Priest, Run (casing) center elevation
Hole, (casing) bottom elevation
bxhie.DN)
Rubber, Run (casing) center elevation
Hole, Run (casing) bottom elevation
Figure 3.3.4 Representation method of reserved holes, adjustment and embedded casing 1—6—7
4 Steel structure
4.1 Marking method of commonly used steel
4.1.1 The marking method of commonly used steel shall comply with the provisions in Table 4.1.1. Marking method of commonly used steel
Table 4.1. 1
Equal angles
Unequal angles
Engineering steel
Body industry
Enzyme wall equal angles
12 Body wall equal angles
Thin whole steel
Body wall roll over push steel
Sea sugar industry edge Z-shaped shot
T-shaped steel
H-shaped steel
Measuring machine rail
Light load and rail making
1—6-8
L_ Bxhxt
BL_bxr
Bbxaxs
Bhxbxt
Axbxax
TW ××
TM ××
TN ××
HN ××
1××kg/m3
b is limb width
" is limb thickness
B is length and width,
B is length and width,
B is length and thickness
Light I-beam is marked with Q
N Engineering model
Light stainless steel is marked with Q
N Steel model
Outer diameter × wall ratio
Transmission type is marked with B
1 is wall friction
TW is wide T-beam
TM is medium T-beam
TN is medium T-beam
HW is wide H-beam
HM is medium H-beam Steel
HN is screen wing slow H type example
Detailed description Product specification model
4.2 Indication method of bolts, holes and electric welding rivets 4.2.1 The indication method of bolts, holes and electric welding rivets shall comply with the provisions in Table 4.2.1. Table 4.2.1 Indication method of bolts, holes and electric welding rivets Serial number
Permanent bolt
High-strength screw
Mounting bolt
Expansion bolt
Title screw inspection hole
Long ring screw
Electric welding rivet
1. The thin \+\ line indicates the positioning line
2. M indicates the bolt type nut
3. + indicates the diameter of the screw inspection hole
4. d Indicates expansion bolts, electric welding iodine
order diameter
5. When using lead-out lines to mark bolts
mark the specifications above the lead line and mark the threaded hole diameter below the horizontal line
4.3 Commonly used welding marking methods
4.3.1 In addition to complying with the provisions of the current national standard "Welding Symbol Representation Method" (GB324), the welds of welded steel structures shall also comply with the provisions of this section. 4.3.2 The marking method of single-sided welds shall comply with the following provisions: When the arrow points to the side where the weld is located, the graphic symbol and size shall be marked above the horizontal line (Figure 4.3.2a); when the arrow points to the other side where the weld key is located (the corresponding side>), the graphic symbol and size shall be marked below the horizontal line (Figure 4.3.2b). 2. When indicating a weld around the perimeter of a workpiece, the surrounding weld symbol is a circle, drawn at the turning point of the lead-out line, and the weld angle dimension K is marked (Figure 4.3.2c). Figure 4.3.2 Marking method of single-sided weld clock
4.3.3 The marking of double-sided welds shall be marked with symbols and sizes above and below the horizontal line. The top indicates the symbol and size of one side, and the bottom indicates the symbol and size of the other side (Figure 4.3.3a); when the weld sizes on both sides are the same, it is only necessary to mark the weld symbol and size above the horizontal line (Figure 4. 3.3b, c, d). PH)N
（H）
Figure 4.3.3 Method of marking double-sided welds
4.3.43.3.4. The welds of 3 or more welds welded together shall not be marked as double-sided welds. The weld symbols and dimensions shall be marked separately (Figure 4.3.4). KN
Figure 4.3.4. Method of marking welds of 3 or more welds 4.3.5. When only one of the two welds welded together has a groove (such as a single-sided V-shaped weld), the lead-out arrow must point to the weld with the groove (Figure 4.3.5). 0
Figure 4.3.51 Method for marking welds with static grooves of weldments4.3.6 For two weldments that are connected to each other, when the weld is a single-sided weld with double-sided asymmetric grooves, the lead-out arrow must point to the weldment with the larger groove (Figure 4.3.6). Marking method for asymmetric groove welds
Figure 4.3.6
4.3.7When welds are irregularly distributed, when marking weld symbols, it is advisable to add a solid line (indicating visible welds) or a thin line (indicating invisible welds) at the welds (Figure 4.3.7)
Cannot be marked
Figure 4,3.7Marking method for irregular welds
4.3.8The same weld symbol shall be indicated in the following way: On the same drawing, when the weld type, section size and auxiliary requirements are the same, only one place can be selected to mark the weld symbol and size, and "same weld symbol" can be added. The same weld symbol is a 3/4 arc, drawn at the turning point of the lead-out line (Figure 4.3.8a). h
Figure 4.3.8Marking method for the same weld 2 On the same drawing, when there are several identical welds, the weld classification number can be marked. In the same type of weld, one place can be selected to mark the weld symbol and size. The classification number is in uppercase Latin letters A, BC (Figure 4.3.8b). 4.3.9 For welds that need to be welded on the construction site, the "field weld" symbol should be marked. The field weld symbol is a black triangle flag drawn at the turning point of the lead line (Figure 4.3.9).
Figure 4.3.9 Representation method of field welds
4.3.10 For longer fillet welds in the drawing (such as flange welds for welding solid steel bars), the weld size value K can be marked directly next to the fillet weld without the lead line (Figure 4.3.10). Figure 4.3.10 Marking method for longer welds 4.3.11 The symbol of the penetration fillet weld should be marked in the manner of Figure 4.3.11. The symbol of the penetration fillet weld is a black circle drawn at the turning point of the lead line. Figure 4.3.11 Method of marking residual fillet welds 4.3.12 Local welds shall be marked in the manner of Figure 4.3.12. It is advisable to mark
Medical 4.3.12 Method of marking local welds 4.4 Dimension marking
4.4.1 Two very close centroids of two components shall be staggered outwards at the intersection (Figure 4.4.1).
Figure 4.4.1 Method of indicating that the centroids of two components do not coincide 4.4.2
The dimensions of curved components shall be marked along the curve of their arc with the length of the arc axis (Figure 4.4.2).
乳d-21.6
困4. 4. 2 Method for marking the dimensions of curved components 1-—6—9
4.4.3 For cut plates, the length and position of each line segment should be marked (Figure 4.4.3) Figure 4. 4. 3 Method for marking the dimensions of cut plates 4.4.4 For components with unequal angles, the dimensions of the angles must be marked (Figure 4.4.4). Lbxa
Figure 4. 4.4 Node dimensions and marking methods for unequal angles 4.4.5 For node dimensions, the dimensions of the node pole and the center or center of each consumable bolt hole should be indicated. As well as the distance from the end of the member to the intersection of the geometric center line (Figure 4.4.4, Figure 4.4.5) 4.4.6 For components with double-section steel composite sections, the number and dimensions of the tie plates should be indicated (Figure 4.1.6), and the horizontal line should be drawn: the number of tie plates and the width and thickness of the tie plates should be marked. The length of the tie plates should be marked below the horizontal line. 4.4.7 For non-welded node plates, the dimensions of the node plates and the distance from the center of the bolt holes to the intersection of the geometric center lines should be indicated (Figure 4.4.7). 4.4.6 Marking method for steel plate
Figure 4, 4.7 Marking method for non-welded node plate size 1-6-10
5 Timber structure
5.1 Commonly used method for indicating the cross section of timber members 5.1.1 Commonly used method for indicating the cross section of timber members shall comply with the provisions in Table 5.1.1. Table 5.1.1 Commonly used method for indicating the cross section of timber members Name
1724 or.
1. The cross section of timber shall have both horizontal and longitudinal lines
2. The elevation drawing generally does not have horizontal and longitudinal lines, but the elevation drawing of timber shall have vertical and longitudinal lines
5.2 Method for indicating the connection of timber members
5.2.1 Method for indicating the connection of timber members shall comply with the provisions in Table 5.2.1. 5.2, 1 Methods of indicating the connection of wood components No.
Nail connection Front face method
(where the nail cap can be seen)
Back face method
(where the nail cap cannot be seen)
Unscrew connection
Front face method
(where the nail cap can be seen)
Screw connection
Back face method
(where the nail cap cannot be seen)
Explosive bolt connection
Parts connection
Meat connection
Roof panel
Hollow panel
Shaped panel
Dense panel
Stairway panel
Renewal 5. 2.1
1. When double nuts are used, they should be added
2. When steel plywood is used, it is called
Pad line
Only in the sub-single-line diagram
Appendix A Common component codebZxz.net
Common component code
Agency theory
Cover plate suction board
Connecting beam
Foundation nest
Overhead support beam
Front face vertebral beam
Code number
Equipment foundation
Block, pile
Internal support
Vertical support
Horizontal support
Rain shield or door board
Generation number
Crane safety walkway board
Gutter board||tt ||Roof beam
Cranes beam
Monorail crane beam
Track connection
Note: 1
Skylight
Frame column
Construction column
Code processing station
Precast screw parts
Skylight
Reinforcement mesh
Reinforcement skeleton
Components, existing reinforced concrete components, steel components and wooden components. The structure codes in this appendix can be directly adopted. When drawing, when it is necessary to distinguish the material types of small components, the column material code should be added before the component code. And it should be explained in the drawings. The code of prestressed reinforced concrete components should be preceded by \Y\, such as YDI represents prestressed reinforced concrete crane beam.
Explanation of terms used in this standard
1 In order to facilitate the differentiated treatment when implementing the provisions of this standard, the terms with different degrees of strictness are explained as follows:
1) Terms that indicate that it is very strict and must be done: positive terms use "must";
negative terms use "strictly prohibited".
2) Terms that indicate that it is strict and should be done under normal circumstances: positive terms use "should";
negative terms use "should not" or "must not". 3) Terms that indicate that there is a slight choice and that it should be done first when conditions permit: positive terms use "should" or "may";
negative terms use "should not";
terms that indicate that there is a choice and that it can be done under certain conditions use "may". When this standard specifies that it should be implemented in accordance with other relevant standards and specifications, it is written as "2
safe implementation\ or \should comply with requirements or regulations". 1-6-11For example, Y DI indicates pre-reinforced concrete crane beam.
Explanation of terms used in this standard
1 In order to facilitate the differentiated treatment when implementing the provisions of this standard, the terms with different strictness requirements are explained as follows:
1) Terms that indicate that it is very strict and must be done: positive terms use "must";
negative terms use "strictly prohibited".
2) Words that indicate strictness and should be done in normal circumstances: positive words use "should"; negative words use "should not" or "must not". 3) Words that indicate that there is a slight choice and should be done first when conditions permit: positive words use "should" or "may";
negative words use "should not";
words that indicate there is a choice and can be done under certain conditions use "may". When this standard specifies that it should be implemented in accordance with other relevant standards and specifications, it should be written as "2
安执行\or\should comply with requirements or regulations". 1-6-11For example, Y DI indicates pre-reinforced concrete crane beam.
Explanation of terms used in this standard
1 In order to facilitate the differentiated treatment when implementing the provisions of this standard, the terms with different strictness requirements are explained as follows:
1) Terms that indicate very strict and must be done: positive terms use "must";
negative terms use "strictly prohibited".
2) Words that indicate strictness and should be done in normal circumstances: positive words use "should"; negative words use "should not" or "must not". 3) Words that indicate that there is a slight choice and should be done first when conditions permit: positive words use "should" or "may";
negative words use "should not";
words that indicate there is a choice and can be done under certain conditions use "may". When this standard specifies that it should be implemented in accordance with other relevant standards and specifications, it should be written as "2
安执行\or\should comply with requirements or regulations". 1-6-11
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