CB/T 81-1999 Marine Steel Inclined Ladder CB/T81-1999 Standard download decompression password: www.bzxz.net

UDC629.12.011.57
National Standard of the People's Republic of China
GB 4444-84
C6 Zuo 1-1999
Ship's steel inclined ladders
1984-06-01 Issued
1985-03-01 Implementation
Approved by the National Bureau of Standards
National Standard of the People's Republic of China
Ship's steel inclined ladders
UDC629.12.011
GB4444-84
Steel inclined ladders are mainly used in open-air parts. If appropriate, such as engine room, cargo hold, indoor cabin, etc. can also be selected. The types and main dimensions of steel inclined ladders are shown in Table 1. Table 1
Slope α
50°5560°
65°70°
50°5560°
6570°
Note: The dustproof plate is selected by the designer.
Published by the National Bureau of Standards on June 1, 1984
Step width B
700,800
500z600
700;800
400z500#600
700,800
500600
700；800
400;500*600
Layer spacing
400~3500
400~3400
400~4400
500~3500
400~3500|| tt||400~3400
400~4400
500~3500
Ladder length L
283~4667
261~3916
261~4961
331~3641
283~4667
261~3916
261~4961
331~3641
1985-03-01Implementation
GB4444—84
The types and main dimensions of 2A type steel inclined ladder shall be as shown in Figure 1 and Tables 2~7. Next door
More than 3.5m, add a root in the middle
Marking place
C= 400~ 500≤
Drainage hole
"Ladder" frame
Ladder frame length L
1500 and below
1600 to 3500
3600 to 5000
Ladder frame combination material
L40×40×4 profile
L50×50×4 profile
L50×50×6 profile
1-ladder frame, 2-step board, 3-wide step Step board, 4 upper ear plate; 5 lower ear plate; 10 dustproof plate Note: ① The size of the handrail is for reference only and is determined by the user. No handrail is required for steps below three. ② The installation of the ladder frame (part 1) and the ear plate is shown in Figure 3. ③ The connection between the end of the handrail and the ladder frame (part 1) is shown in Figure 4. 2
GB4444-84
3B type steel inclined ladder type and basic size according to Figure 2 and Table 2 to 7. Next door
More than 3.5m add a
C = 400~500㎡
Ladder width b
Marking place
Drainage hole
Ladder length
1500 and below
1600 to 3500
3600 to 5000
Frame profile
150×8
Factory 16160×36×8|| tt||factory 18180×40×9
1-ladder frame; 2-tread plate, 3-wide tread plate; 4-upper ear plate, 5-lower ear plate; 10-dustproof plate Note: ①The size of the handrail is for reference only; it is determined by the user. No handrail is required for steps below three steps. ②The installation of the ladder frame (part 1) and the ear plate is shown in Figure 3. ③The connection between the filler at the end of the handrail and the ladder frame (part 1) is shown in Figure 4. mm
4 Ladder frame side panel installation filler and ear plate details
GB4444—84
1-ladder frame, 5-ear plate; 7-side panel filler, 8-hexagonal bolt; 9-hexagonal nut handrail end filler details
GB4444—84
1-ladder frame; 6-handrail end filler, 8-hexagonal bolt; 9-hexagonal nut 5
The main dimensions of the steel inclined ladder are in accordance with Tables 2 to 7. 6.1
GB4444—84
The main dimensions of the steel inclined ladder with B=700 and 800mm are in accordance with Table 2. α=45°,
Number of steps
Height between floors
Note: Minimum opening size of the ladder mouth:
Length 2000.
Width B+150,
B= 800
α=50,
height between floors
GB4444-84
600, 700, 800mm steel inclined ladder basic dimensions according to Table 3. B=500,
Note: ①B=500, 600 height between floors up to 3400. H3
②Minimum opening size of ladder mouth: width B+150, length: 1700. A type
aα=55;
height between floors
GB4444-84
800mm steel inclined ladder dimensions according to Table 4.
B=500, 600, 700, 8
600 height between floors up to 3400.
Note:④B=500, 6
②Minimum opening size of ladder opening: width B+150, length 1450.8
Weight kgbzxz.net
a=60°,
Height between floors
GB4444--84
Basic dimensions of 600, 700, 800mm steel inclined ladders are in accordance with Table 5. B=500,
B=500,
600 The height between floors is up to 3400.
②Minimum opening size of ladder opening: width B+150, 1 length 1200.
B=800|B=500
B=700IB=800
Number of steps
Height between floors
GB4444-84
The basic dimensions of 600mm steel inclined ladder are according to Table 6. 500, 6
B=400,
Note: The minimum opening size of the ladder: width B+150, length 950.
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