CB/T 801-2001 Cargo Hold Inclined Ladder CB/T801-2001 Standard Download Decompression Password: www.bzxz.net

ICS 47.020.50
Record number: 9827-2002
Ship Industry Standard of the People's Republic of China
CB/T 801-2001
Cargo Hold Inclined Ladder
Inclined Ladder In Hold
Published on 2001-11-15
Published by the Commission of Science, Technology and Industry for National Defense
Implemented on 2002-02-01
CB/T801-2001
This standard is a revision of CB*801-85 "Cargo Hold Inclined Ladder". This standard abandons the original cumbersome structural type, improves the A-type cargo hold inclined ladder, and adds the B-type spiral cargo hold inclined ladder. The B-type inclined ladder occupies a small area and is particularly suitable for installation in the corrugated bulkhead and narrow space. This standard meets the requirements for escalators in Appendix 17 of Part 32 of the Australian Maritime Directive "Cargo Transfer Equipment". This standard replaces CB*801-85 from the date of entry into force. This standard is proposed by China State Shipbuilding Corporation. This standard is under the jurisdiction of Jiangnan Shipyard (Group) Co., Ltd. Drafting unit of this standard: Hudong Shipyard
Main drafters of this standard: Hao Yuejuan, Zhou Guoqiang This standard was first issued in December 1975 and revised for the first time in October 1985. 1 Scope
CB/T801-2001
Cargo hold inclined ladder
This standard specifies the classification, requirements, inspection rules and markings of cargo hold inclined ladders (hereinafter referred to as "inclined ladders"). This standard applies to inclined ladders used for people to go up and down in cargo holds. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. At the time of publication of the standard, the versions shown are all valid. All standards are subject to revision. Parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T699-1999 High-quality structural carbon steel
GB/T 7001988
GB/T3091-1993
GB/T8162—1999
GB/T8923-1988
GB/T 99451988
Carbon structural steel
Galvanized welded steel pipe for low-pressure fluid transportation
Seamless steel pipe for structure
Surface rust grade and rust removal grade of steel before painting Bulb flat steel for shipbuilding
The types and main specifications of inclined ladders are shown in Table 1.
Ordinary inclined ladder
Spiral inclined ladder
Inclination.
Ladder width Bbzxz.net
Inclined ladder type and main specifications
Storey height Yue
1500~6000
Ladder length B
1484~3000
3100~4500
4600~6724
Ladder height H
13502650
2850~4050
42505850
45008 000
8250~11500
CB/T801-2001
3.2For the structural type and basic dimensions of type A inclined ladder, see Figure 1 and Table 2. 000
Handrail spacing system 1.8
CB/T801-2001
1—ladder frame: 2—step; 3 connecting plate
Figure 1Structural type of type A inclined ladder
Note: The weight in the table does not include the weight of the handrail.
CB/T801-2001
Basic dimensions of type A inclined ladder
Quantity (α)
CB/T801-2001
3.3For the structural type and basic dimensions of type B inclined ladder, see Figure 2 and Table 3. Hull structure
Upper platform
Body structure
The selector shall determine it according to the actual position,
CB/T801-2001
-16x65
L50X50X6
1-cladding; 2-ladder frame; 3-handrail; 4-railing column: 5-rail; 6-stepFigure 2Structural type of type B inclined ladder
Note 1: H and below shall be determined by the selector
CB/T801-2001
Basic dimensions of type B inclined ladder
Note 2: The weight is only the weight within the ladder height H, excluding the weight of the outside and handrails.
Number of steps
Weight (α)
3.4 ​​Marking example
CB/T801-2001
An ordinary inclined ladder with an inclination of 60°, a ladder width of 450mm and a ladder length of 3046mm is marked as: Cargo hold inclined ladder A 60°×450×3046CB/T801-2001A spiral inclined ladder with a ladder height of 8500mm is marked as: Cargo hold inclined ladder B 8500CB/T801-2001
The main parts and materials of the inclined ladder are as shown in Table 4.
Table 4 Materials of main parts of inclined ladder
Part name
Guard column
Ball flat steel for shipbuilding
Seamless steel pipe for structure
Galvanized welded steel pipe
Q235-A
Q235-A
Q235-A
Standard No.
GB/T 99451988
GB/T8162-1999
GB/T 699 1999
GB/T700—1988
GB/T 30911993
GB/T 699—1999
GB/T 700—1988
GB/T 7001988
The main dimensions of the inclined ladder shall comply with the provisions of Table 2 or Table 3. The allowable deviation of the step spacing of 250mm is ±2mm, and the cumulative deviation of the layer height
shall not exceed ±5mm.
The top of the square steel of the step must be on the same plane and remain horizontal. 4.3
The surface of the handrail of the inclined ladder shall be smooth and free of burrs. The handrails on each side shall be in a vertical plane. 4.5
After the inclined ladder and its parts are assembled, there shall be no defects such as skewness and distortion. The weld shall be firm and no defects such as cracks and slag inclusions are allowed. 4.6 The surface of the inclined ladder shall be treated to meet the requirements of Sa2 or St2~3 specified in GB/T8923, and shall be coated with anti-rust primer. 5 Test method
5.1 Appearance
Observe the appearance of the inclined ladder by visual inspection. The results shall meet the requirements of 4.34.6. 5.2 Dimensions
Use universal measuring tools to measure the main dimensions of the inclined ladder. The results should meet the requirements of 4.2. 6 Inspection rules
6.1 Inspection classification
The inspection of the inclined ladder is divided into type inspection and factory inspection. 6.2 Type inspection
6.2.1 Inspection timing
Type inspection should be carried out when the inclined ladder has one of the following conditions:8
a) When the first product or the product is transferred to the factory for production: CB/T801-2001
b) When the structure, material or process of the formally produced product has a major change; c) When the quality supervision agency proposes type inspection. Inspection items
Type inspection items are in accordance with Table 5.
Inspection items
Inspection items
Number of inspection samples
Chapter number of requirements
Chapter number of test methods
Type inspection
Select one ordinary inclined ladder and one spiral inclined ladder from the first product or mass-produced products for type inspection. 6.2.4 Judgment rules
Factory inspection
If all inspections of the inclined ladder meet the requirements, it can be considered to have passed the type inspection. If there are items that do not meet the requirements, re-inspection is allowed after correction, and the type inspection is still considered to have passed the re-inspection. Re-inspection is allowed only once. 6.3 Factory inspection
6.3.1 Factory inspection items are in accordance with Table 5.
6.3.2 Each inclined ladder should be inspected for delivery. 6.3.3 If all inspections of the inclined ladder meet the requirements, it can be considered to have passed the factory inspection. If there are items that do not meet the requirements, they are allowed to be re-inspected after correction. If they are qualified in the re-inspection, they can still be considered qualified for the factory inspection. If there are still items that do not meet the requirements after the re-inspection, the inclined ladder is judged to be unqualified. 6.3.4 After the inclined ladder passes the inspection, the inspection department should issue a certificate of conformity. 1
The following product marks should be marked in the obvious parts of the product: a)
Manufacturer name or trademark;
Product model and standard number:
Year and month of production;
Inspection pass seal.
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