The objectives of this reference manual are to provide the basis for an understanding of the: • Differences between ASD and LRFD for substructure design • Benefits of LRFD for substructure d…Full description
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tower-cranechecklist.docx
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Crane Spreader Crane Spreader
Dis Manta Ling and Removal of
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Load calculations for live live , dead and crane loads D
Frames 5 m c/c 3.6m Φ = 22.86° C
B
10kN 50kN
0.849m 5.792m 50kN
E
F
7.8m
0.849m G
A
28.2 m B'
F'
B
F
17.08 m
17.08 m
Frame Elevation
Plan
Load Calculations
Dead Load on roof (including self weight accidental load etc.)
0.4
Live Load on roof
0.52
Crane capacity
50
Crane girder weight
8.33333
Crab (trolley) weight
10
Column height
7.8
Rafter rise
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Spacing between frames
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3.6 5
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Crane Spreader Crane Spreader
Dis Manta Ling and Removal of
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Effective span of EOT crane
15.382
Wheel base along girder
3.8
Height at which EOT crane bottom is fixed
5.792
Vertical load on gantry The weight of the crane is shared by two portal frames.At the crab, the reaction on wheel due to the lifted weight and the crab can be obtained by taking moment about the centre line of the wheels.(point B) The extreme position of crane hook is assumed as 1m from the centre line of rail. The span of crane is approximately taken as15.382m. And the wheel base along the gantry girder has been taken as 3.8 m. (50+10)/2 = 30 1m B
RB
50/2 = 25 You're Reading a Preview 7.691 m Unlock full access 15.382 m with a free trial. Download With Free Trial
F
RF
Reaction at F
14
Reaction at B
41
To get maximum wheel load on a frame from gantry girder BB', taking the gantry girder as simply supported. Sign up to vote on this title
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tower-cranechecklist.docx
1
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Crane Spreader Crane Spreader
Dis Manta Ling and Removal of
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Maximum wheel load @ B
63
Minimum wheel load @ B
22.4
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Tranverse load (surge) Lateral load per wheel (i.e Lateral load is assumed as 5 % of the lifted load and weight of the crab acting on each rail)
1.5
Lateral load on each column (By proportion)
2.33
Dead Load Replacing the distributed dead load on rafter by equivalent concentrated loads at two intermediate points corresponding to purlin locations on each rafter Udl x span / 6
1.7877
Live Load You're Reading a Preview Replacing the distributed live load on by equivalent Unlock full access withrafter a free trial. concentrated loads at two intermediate points corresponding to purlin locations onWith eachFree rafter Download Trial Udl x span / 6
2.324
Crane Load Maximum Vertical load on columns (acting at minimum eccentricity of 600 mm from column centreline) Sign up to vote on this title
