To calculate dead and live load for industrial steel structures and to apply them using TSD

1. Calculate dead load in design report based on IS code and apply dead load on the model

• Finishes of 50mm
• Slab as per design
• Brickwall 150mm thickness
• Roofing load based on purlin size
• Ceiling loading 0f 0.3KN per sq m

AIM : To calculate dead load in design report based on IS code and apply dead load on the model

TOOLS REQUIRE :

 Manage Properties, Properties tab, load, slabs, load cases, dead load, line load, imposed load, UDL load, validation, load       combinations, 3D view, project browser, seen content

PROCEDURE :

1. Firstly open the file 

2. Now select load cases from tool bar

3. Then a pop up window appears with different load cases

4. Now add required loads according to the requirement by selecting new option from pop up window

5. After adding all the require load cases select load combinations and then select generate option, now choose require load cases like wind load seismic load etc.

6. Now select ground floor level and then select required load from bottom tool bar and then select load according to IS code standards and then apply them to the project

Finishes of 50mm
0.05 x 24( acc to IS CODE ) = 1.2 KN/m2

for the ground floor as well as for the first floor we can apply the load in the same way as select dead load

in the left corner dialog box

select the load icon and for finishers we can select the area loading option and apply it and using property window modify its value to 1.2 KN/m2

Load of slab will be considered automatically

Brickwall thickness = 150

Ground floor to First floor level load Calculation :

= Height X Unit weight X Brickwall thickness

= 5.2 M X 20KN X 0.15M = 15.6 KN/m2 

For walls with columns coordination, we apply UDL

for remaining walls apply line load

First floor level to roof level load calculation : 

load = height x unit weight x brick wall thickness = 6.8 x 20 x 0.15 = 20.4 KN/m2 

similar to ground floor loading we can do it for first floor changing the value

Ceiling load : 0.3KN/m2 

CALCULATIONS :

DEAD LOAD :

Slab load                                              = Model slab in software

Finishes loading (50THK)                       = 0.05m x 24 KN/m3 = 1.2 KN/m2

Brick wall with cement plaster thickness  = 150mm

Unit weight                                          = 20 KN/m3

Floor Height (GF to FF)                          = 5.2 m

Brick wall loading                                 = 15.6 KN/m

Floor Height (FF to Roof)                       = 6.8 m

Brick wall loading                                 = 20.4 KN/m

Roof loading                                        = 1.5 KN/m2

2. Calculate live load in design report based on IS code and apply live load on the model

• Assume the loading based on IS 875
• Roof loading
• Consider equipment loading as 5KN per sq m

AIM : To calculate live load in design report based on IS code and apply live load on the model

TOOL REQUIRE :

Load, Load cases, Dead load, Area, 3D view, project browser, seen content

PROCEDURE : 

1. Firstly, open the previous project file

2. Now select bottom tool bar and then select imposed load from different loads appeared       

3. Now we can add required live loads to the project by selecting the load and giving required load values according to the IS Code       

4. Now select load tool from tool bar and then select area tool from load tool bar         

5. Now select different live loads for the project according to the IS building standard codes        

6. Now select required load for different room   

Some of the standard loads of different rooms according to IS code 

        Store room = 5 KN/m2

        Office = 3 KN/m2

        Rest room = 2 KN/m2

        Toilets = 2 KN/m2 

        Pantry = 3 KN/m2

        Corridor = 4 KN/m2

        Equipment room = 10 KN/m2

7. Now select different loads as per requirement and apply them to the project     

8.Then repeat the same procedure for all the remaining floors

9. Then finally validate the model and check whether there are any errors or not

RESULT :

Therefore by following the above procedure we can apply live loads to the structure and calculate live loads sucessfully

3. Generate a calculation for 5T crane loading based on following inputs

• Centre to Centre of wheel = 10m
• Weight of crab = 40 KN
• Number of wheels = 4
• Wheel base = 2m

  AIM : To generate a calculation for 5T crane loading based on following inputs

  CALCULATION :

  Max wheel load

  Maximum concentrated load on crane = 50 + 10 = 60 KN

  Self-weight of crane will act as uniformly distributed load of intensity = 40 / 10 = 4 KN/m         

  Taking moment about B :

  Ra x 10 – (60 x 9) - (4 x 5 x 10) = 0

  10 Ra = 740

  Ra = 74 KN

  Rb x 10 – (60 x 1) - (4 x 10 x 5) = 0

  10 Rb = 260

  Rb = 26 KN

  Ra + Rb = 100 KN

  The reaction from the crane girder is distributed equally on two wheels at the end of the crane girder

  Maximum wheel load on each of the crane wheel = 74 / 2 = 37KN

  MAXIMUM BENDING MOMENT :

  Assume self-weight of the gantry girder as 1.5 KN/m

  Total dead load = ( Self-weight of rail + self-weight of gantry girder ) 300 + 1500 = 1800 N/m

  Taking moment about D :

  Rc x 5.5 – (37 x 4.25) - (37 x 2.25) = 0

  Rc x 5.5 = 240.5

  Rc = 240.5 / 5.5

  Rc = 43.72 KN

  Rd x 5.5 – (37 x 1.25) - (37 x 3.25) = 0

  Rd x 5.5 = 166.5

  Rd = 166.5 / 5.5

  Rd = 30.27 KN

  Bending moment under wheel due to live load = Rd x 2

                                                                     = 30.27 x 2

                                                                     = 60.54 KN

  Bending moment due to impact = 0.10 x 60.54 ( 10 % increase due to MOT) = 6.054 KNm

  Total bending moment due to live load and impact load = 60.54 + 6.054 = 66.594 KNm

  Bending moment due to dead load = W x l x l / 2 = 1.8 x 5.5 x 5.5 / 2 = 27.22 KNm

  Maximum bending moment = 66.594 + 27.22 = 93.814 KNm

  MAXIMUM SHEAR FORCE :

  For maximum shear force

  Rc x 5.5 –(37 x 5.5) - (37 x 2.5) = 0

  Rc = 9.25 + 20.35 / 5.5

  Rc = 5.381 KN

  The maximum shear force due to wheel load = 5.31 KN

  LATERAL FORCES :

  Lateral forces traverse to rails = 5% of the weight of crab and weight lifted

                                                      = 0.05 ( 40 + 10 )

                                                      = 2.5

  Lateral forces on each side wheel F1 = 2.5 / 2 = 1.25 KN

  Maximum horizontal reaction due to the lateral force by proportion at C  =  Lateral force x reaction at C due to vertical load                                                                                                                  / maximum wheel load due to vertical load

                                                                                                           = 1.25 x ( 43.72 / 37) = 1.44 KN

  At D

  2.5 – 1.44 = 1.06 KN

  Bending moment due to lateral load by proportion = (1.25 / 37) x 5.31 = 0.179 KNm

  RESULT :

  Therefore by using above procedure calculation for the 5T crane loading generated successfully from given values