Monorail Beam Design 130121400-09-010

Title Project Package Client

MONORAIL CRANE BEAM DESIGN CALCULATIONS

Doc. No.

GGLNG PROJECT

Rev. No. Date

ANTI-FOAM INJECTION TANK (3412-PK-1201) BECHTEL INTERNATIONAL INC. PO NO. 25576-140POA-MW00-00002 (REV.4)

MONORAIL CRANE BEAM DESIGN CALCULATIONS

A

24/8/2015

ISSUED FOR APPROVAL

ID

REV NO

DATE

DESCRIPTION

CHECKED BY

Page 1 of 14

Title

MONORAIL CRANE BEAM DESIGN CALCULATIONS

Doc. No.

GGLNG PROJECT

Rev. No.

Project Package Client

ANTI-FOAM INJECTION TANK (3412-PK-1201) BECHTEL INTERNATIONAL INC. PO NO. 25576-140POA-MW00-00002 (REV.4)

NOMENCLATURE

E

Modulus of elasticity (2.1x E6 Kg/cm²)

Fa

Actual axial stress (Kg/cm²)

Fallw

Allowable axial stress (Kg/cm²)

Fy

Minimum yield strength of the beam material(36000 psi)

K

Effective length factor

L

Unbraced length of compression member

N

Constant (1.10 for Stress level 1 cases; as per AISC ASD)

r

Radius of gyration of the member (cm)

Page 2 of 14

Date

Title Project Package Client

MONORAIL CRANE BEAM DESIGN CALCULATIONS

Doc. No.

GGLNG PROJECT

Rev. No.

ANTI-FOAM INJECTION TANK (3412-PK-1201) BECHTEL INTERNATIONAL INC. PO NO. 25576-140POA-MW00-00002 (REV.4)

Page 3 of 14

Date

Title

MONORAIL CRANE BEAM DESIGN CALCULATIONS

Doc. No.

GGLNG PROJECT

Rev. No.

Project Package Client

Date

ANTI-FOAM INJECTION TANK (3412-PK-1201) BECHTEL INTERNATIONAL INC. PO NO. 25576-140POA-MW00-00002 (REV.4)

DESIGN FOR MONORAIL CRANE SUPPORTING BEAMS: Procedure followed for design of monorail beam as per Crane Manufacturers Association of America(CMAA) Specification No. 74 ("Specifications for Top running & Under running single girder electric travelling cranes utilizing under running trolley hoist")

INPUT PARAMETERS :

l=600

a=150

a=150

x=0

b="&400

c=200

I beam 150 x 100 x 21.1kg/m

A

B

C P=669.7

Crane continous beam carrying the hoist; is supported at two points @ 520 cm apart and running along the bottom flanges of the beams.

:

Runway Length of the crane Type of supporting provided for each I beams

:

8.2 mts.

Simply Supported Beams with overhanging 1.5 mts span on both sides.

Provided beam for the crane bridge is I-Beam 150x100x6x9 x 21.1 kg/m. Maximum unbraced Span length for I beam

L

:

595 cm

Maximum overhanging span length

a

:

150 cm

b

:

300 cm

c

:

220 cm

When point load considered between supports

Page 4 of 14

Title

MONORAIL CRANE BEAM DESIGN CALCULATIONS

Doc. No.

GGLNG PROJECT

Rev. No.

Project Package Client

Date

ANTI-FOAM INJECTION TANK (3412-PK-1201) BECHTEL INTERNATIONAL INC. PO NO. 25576-140POA-MW00-00002 (REV.4)

Uniform Load acting on the span for each I beam:

:

.78 kg/cm

FDL

:

1.10

w

:

.85 kg/cm

Uniform Load on the selected span Dead Load Factor for uniform load Effective Uniform Load

Beam Overhanging One Support-Concentrated Load at End of Overhang: Crane Bridge Assembly weight

Bwt

:

89 kg

Hoist weight

Hwt

25 kg

Dead Load Factor for point load

DLF

1.05

(Bwt+Hwt)xDLF

:

120 kg

Live Load/Hoist capacity of crane

Hcap

:

500 kg

Hoist Load Factor

HLF

:

1.10

Effective Live Load

HcapxHLF

:

550.00

Effective total load

(Bwt+Hwt)xDLF+(HcapxHLF)

:

670 kg

P

:

670 kg

Axial Load

Pax

:

67 kg

Lateral Load

PLat

:

134 kg

Effective dead load

Total Load acting at the selected span of each beam

Page 5 of 14

Title

MONORAIL CRANE BEAM DESIGN CALCULATIONS

Doc. No.

GGLNG PROJECT

Rev. No.

Project Package Client

Date

ANTI-FOAM INJECTION TANK (3412-PK-1201) BECHTEL INTERNATIONAL INC. PO NO. 25576-140POA-MW00-00002 (REV.4)

1. Check for BENDING :

Maximum bending moment due to concentrated load at overhung point C

Mmax@ B=Pa

:

100455 kg.cm

Maximum bending moment due to uniform dead load of beam at B due to overhang length.

Mmax@ B=Pa²/2

:

9603 kg.cm

Actual major axis bending moment (In-plane bending)

Mipb=Mmax+Mmax'

:

110058 kg.cm

Maximum bending allowable stress

fs

:

1519 kg/cm2

Zxx

:

72.5 cm3

Zxx

:

168 cm3

:

DESIGN SAFE

Required Section Modulus

Selected beam IB 100 x 100 x 17.2 kg/m Section modulus for the selected I beam Check for Bending for selected beam

Page 6 of 14

Title

MONORAIL CRANE BEAM DESIGN CALCULATIONS

Doc. No.

GGLNG PROJECT

Rev. No.

Project Package Client

Date

ANTI-FOAM INJECTION TANK (3412-PK-1201) BECHTEL INTERNATIONAL INC. PO NO. 25576-140POA-MW00-00002 (REV.4)

2. Check for DEFLECTION :

Deflection due to concentrated load at overhung point C. Deflection due to concentrated load between supports A and B

Yc={Pa²(L+a)}/3EI

Yc'={Pbc(b+2c) Sqrt3b(b+2c)} / 27EIL

:

.35 cm

:

.78 cm

We consider the bigger of the two (Yc & Yc') to check for limits of deflection for the worst case.

Maximum deflection of the beam

ymax

:

.78 cm

Selected beam IB 100 x 100 x17.2 kg/m Moment of Inertia for selected I beam

Ixx

:

1020 cm4

Maximum allowable deflection

yall

:

1.98 cm

:

DESIGN SAFE

Check for Deflection for selected beam

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130121400-09-010 A 24/8/2015

ALCULATIONS

SS APPROVED BY

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BEAMS:

sociation of America(CMAA) tric travelling cranes utilizing under

d running along the bottom flanges

nging 1.5 mts span on both sides.

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130121400-09-010 A 24/8/2015

As Per CMAA No.74 code

As Per CMAA No.74 code

As Per AISC ASD, The axial load is 10 % of point load acting in-line or longitudinally. As Per AISC ASD, The lateral load is 20 % of point load acting normal to or perpendicluar to the beam.

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130121400-09-010 A 24/8/2015

As in our case (Stress Level 1 per CMAA) the bending allowable stress is 0.60*Fy. Where Fy=36000psi (2531kg/cm²)

Property of selected beam

N SAFE

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130121400-09-010 A 24/8/2015

case.

Property of selected beam

Deflection limitation as per Spec No. 74: Vertical deflection of monorail beam shall be limited to L/300.

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