Design of Industrial Structures — Summer 2025

Enlist the different types of communication towers based on their structural action.

Discuss structural usefulness of Steel towers.

Briefly explain the procedure adopted in the design of chimneys and draw typical cross section showing details of reinforcements (Vertical and horizontal).

Differentiate between bunker and silo.

Explain various types of loads acting on the transmission line towers. Under What circumstances torsional load occur on them?

Design a circular bunker to store 20 tonnes of coal. Density of coal is 9 kN/m3 and angle of repose is 30 degree. Use limit state method of design and adopt grades M20 and Fe 415. Show reinforcement detailing with neat sketch.

How the total height of a transmission line tower is calculated? Explain in brief the factors governing the height of transmission line tower.

Shell thickness at base = 500 mm

Wind Intensity=1.8 kN/m2throughout

Thickness of fire brick lining = 100 mm

Air Gap=100 mm

Temperature difference = 70 °C

Coefficient of thermal expansion = 11 x 10-6 / °C1

Es=210 x 103 N/mm2

M35 grade of concrete and Fe 415 grade steel

Design a simply supported gantry girder to be used in an Industrial building for the following data: Crane Capacity = 160 kN Weight of crab = 50 kN Weight of crane (excluding crab) = 170 kN Minimum clearance between crane hook and gantry girder = 1.5 m Wheel base = 3.2 m Distance between C/Cof gantries = 22 m Distance between centre to centre of gantry columns = 6 m Crane type = M.O.T. Assume suitable data if neccesory.

Briefly explain the approximate analysis of Grid Floors according to IS 456:2000

A Reinforced Concrete Grid Floors is to be designed to cover a floor area of 12m X 16m for a Banquet Hall. The spacing of the ribs in mutually perpendicular directions is 2.0 m c/c. Live Load on floor is 2 kN/m2. Adopt M20 grade concrete and Fe415 steel. Assume ends are simply supported. Analyse the Grid Floor by IS: 456:2000 Method or Rankine Grashoff Method.

Draw appropriate figure of square or rectangular bunker and show various structural elements.

Design an angle section for a continuous purlin having a segment span of 3m. It is subjected to UDL of 4 kN/m. Take angle of roof truss is 25⁰ .

Give various loads and load combinations for design of steel structures as per codal provisions.

Asquare bunker having size 3.1m X 3.1m is to be used to store 300 kN coal. Density of coal is 9.5 kN/m3and angle of repose is 300. Considering grade of concrete and steel as M20 and Fe 415 respectively. Design and detail the following.

Side walls

Hopper bottom