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National Crane
Published 5-27-2018 Control # 039-06
1-9
800D
SAFETY INFORMATION
Calculate
Allowable Load
Lifting is not permitted.
Cease Lifting Operations
.
Plan the lift when
V(z)
< calculated
Maximum Permissible Wind Speed.
It is permissible to lift
Allowable load
at this windspeed,
V(z)
Maximum Permissible
Wind Speed > V(z)?
YES
YES
NO
NO
NO
V(z) =
3 second gust wind speed at boom tip, m/s (mph)
Ap
= Projected Wind Area of Load, m
2
(ft
2
)
Determine
Maximum Permissible Wind
Speed
Awr
(Allow)
>Awr
(load) ?
Awr
(load)
= Actual Wind Resistance Area for the Load, m
2
(ft)
Awr
(Allow)
= Allowable Wind Resistance Area of the Load, m
2
(ft2
Cd
= air drag coefficient of load
Calculate
Awr
(load)
= Ap X Cd
Determine
Cd
of Load
Ap
= maximum height X maximum length
Lifting is not permitted.
Cease Lifting Operations
V(z)
> 20.1 m/s (45 mph)
13.4 m/s <
V(z)
< 20.1 m/s
(30 mph <
V(z)
< 45 mph)
Use Main Boom on
Fully Extended Outriggers ONLY
V(z)
< 13.4 m/s (30 mph)
Main Boom
Allowable load =
Published Rated Capacity
Allowable Load = Published Rated Capacity
X Capacity Reduction Factor
(from Load Chart Notes)
Determine
Ap
Ap / Allowable Load
< 0.5 m
2
/t ?
(Ap / Allowable Load
< 0.0025 ft
2
/lb)
Awr
(Allow)
= 1.2 m
2
/t
(Awr
(Allow)
= 0.0059 ft
2
/lb)
From Table 1-2
Calculate
Awr
(Allow)
of allowable load
YES
Calculate Ratio:
Awr
(load)
/ Awr
(Allow)
From (Table 1-3)
Determine 3-Second Gust
Wind Speed at boom tip,
V(z)
V(z) =
[(
z
/10)
0.14
+ 0.4]
v
[m/s]
V(z) =
[(
z
/33)
0.14
+ 0.4]
v
[mph]
FIGURE 1-1
Simplified Method to Determine Maximum Permissible Wind Speed
Fo
r
Reference
Only
Содержание National Crane 800D
Страница 1: ...Operator and Service Manual National Crane 800D F o r R e f e r e n c e O n l y ...
Страница 4: ...F o r R e f e r e n c e O n l y ...
Страница 98: ...MAINTENANCE 800D 3 10 Published 5 27 2018 Control 039 06 THIS PAGE BLANK F o r R e f e r e n c e O n l y ...
Страница 194: ...SPECIFICATIONS 800D 8 4 Published 5 27 2018 Control 039 06 THIS PAGE BLANK F o r R e f e r e n c e O n l y ...
Страница 216: ...INSTALLATION 800D 9 22 Published 5 27 2018 Control 039 06 THIS PAGE BLANK F o r R e f e r e n c e O n l y ...
Страница 232: ...CRANE INSTALLATION 800D 10 16 Published 5 27 2018 Control 039 06 THIS PAGE BLANK F o r R e f e r e n c e O n l y ...
Страница 252: ...SCHEMATICS 800D 2 Published 5 27 2018 Control 039 06 F o r R e f e r e n c e O n l y ...
Страница 255: ...F o r R e f e r e n c e O n l y ...
Страница 256: ...F o r R e f e r e n c e O n l y ...