## STEEL STRUCTURES DESIGN

6th Diploma Exam/Civil/5130/May 2019

## STEEL STRUCTURES DESIGN **6**^{th} Exam/Civil/5130/May 2019

^{th}Exam/Civil/5130/May 2019

** SECTION-A**

**Duration: 3Hrs. M.Marks:75**

**Note: Use of IS: 800 and Steel Tables are permitted in examination.**

**SECTION-A**

**Q1. a) Fill in the blanks. 15×1=15**

- According to IS 800:1984, Maximum Permissible tensile stress in Steel Sections is
**0.**× fy.__6__ - In IS 800: 1984, Symbol fy represents
**minimum yield**stress in Steel. - For 28mm diameter rivet, the diameter of rivet hole will be
**28+2=30mm**. - Sectional area of “ISLC 150 @ 141.3 N/m” is
**1836**mm². - For 75° Fusion Angle the Effective throat thickness of 6mm welds is
**2**mm. - Maximum pitch in rivets shall not exceed
**30t or 300mm.** - Increase in carbon content in steel cause
**decrease ductility**. - ΣV = 0, ΣH = 0 and ΣM = 0 are called
**equations of equilibrium.** - In plate girder Bearing stiffeners are provided at
**the support**. - Zero bending stress occurs at
**neutral axis**of Beam.

##### b) State True or False.

- Beam is a flexural Member.
**(True)** - For Power Driven Shop Rivets (PDSR) allowable shear stress is 100N/mm².
**(True)** - Minimum Pitch Distance in Rivets shall be two times of rivet
**(False)** - Brittle Failure is not possible in Welding.
**(False)** - Strut is a member subjected to an axial Pull.
**(False)**

- Beam is a flexural Member.

## ** SECTION-B**

**Q2. Attempt any five questions. 5×6=30**

- Draw neat and labeled sketches of Lap Joint, Single Cover Butt Joint & Double cover Butt Joint with Riveted Connections.
- Calculate minimum numbers of rivets required to connect a 14mm thick steel flat with a 12mm thick gusset plate to support an axial pull of 230kN for shop fabrication. Also Specify Diameter of Rivets.
- Write the steps to design an axially loaded Column.
- What are purlins?
- Differentiate between Clear Span, Effective Span & Total span of a beam with the help of sketches.
- What are disadvantages of welding?
- What are laterally restrained beams? Explain with Sketches ?
- How depth of Masonry wall foundation is decided?

** SECTION-C**

**Q3. Attempt any three questions.**** 3×10=30**

- Design a simply supported beam of span 4.0 m to carry a superimposed load of 55 kN/m inclusive of its self-weight. The beam is laterally restrained throughout its length.(Assume missing Data)
- Write about various components of Roof Trusses (Minimum Ten).
- Design a Single angle discontinue strut of 2.0 m length to carry an axial compressive load of 100 kN. With welded end connection using 10mm gusset plate. (Assume missing Data)
- Design a 2.5m long Single angle section to act as tension member subjected to a tensile load of 160kN. With Shop Riveted (PDSR) Connections at end. Assume thickness of gusset.
- Calculate the efficiency of Joint shown in
**Figure A**. for shop Fabrication.

## STEEL STRUCTURES DESIGN 6th Exam/Civil/5130/May 2019

### Section a :-STEEL STRUCTURES DESIGN

6th Diploma/Civil/5130/May 2019

According to IS 800:1984, Maximum Permissible tensile stress in Steel Sections is ______× fy.

According to IS 800:1984, Maximum Permissible tensile stress in Steel Sections is 0.6× fy.

In IS 800: 1984, Symbol fy represents ____________ stress in Steel.

In IS 800: 1984, Symbol fy represents__ minimum yield __stress in Steel.

For 28mm diameter rivet, the diameter of rivet hole will be ________

For 28mm diameter rivet, the diameter of rivet hole will be** 28+2=30mm**.

Sectional area of “ISLC 150 @ 141.3 N/m” is _______ mm²

Sectional area of “ISLC 150 @ 141.3 N/m” is **1836** mm².

For 75° Fusion Angle the Effective throat thickness of 6mm welds is ____ mm.

For 75° Fusion Angle the Effective throat thickness of 6mm welds is **2** mm.

Maximum pitch in rivets shall not exceed _______.

Maximum pitch in rivets shall not exceed **30t or 300mm.**

Increase in carbon content in steel cause _________.

Increase in carbon content in steel cause **decrease ductility**.

ΣV = 0, ΣH = 0 and ΣM = 0 are called ________.

ΣV = 0, ΣH = 0 and ΣM = 0 are called **equations of equilibrium.**

In plate girder Bearing stiffeners are provided at ________.

In plate girder Bearing stiffeners are provided at **the support**.

Zero bending stress occurs at _________ of Beam.

Zero bending stress occurs at **neutral axis** of Beam.

##### b) State True or False.

**(True)**

For Power Driven Shop Rivets (PDSR) allowable shear stress is 100N/mm².

**(True)**

Minimum Pitch Distance in Rivets shall be two times of rivet.

**(False)**

Brittle Failure is not possible in Welding.

**(False)**

Strut is a member subjected to an axial Pull.

**(False)**

#### STEEL STRUCTURES DESIGN

6th Diploma Exam/Civil/5130/May 2019 Diploma Solved Paper May 2019 .Click Here

### Section B :STEEL STRUCTURES DESIGN

6th Diploma /Civil/5130/May 2019

Lap Joint, Single Cover Butt Joint & Double cover Butt Joint with Riveted Connections. Click Here

Calculate minimum numbers of rivets required to connect a 14mm thick steel flat with a 12mm thick gusset plate to support an axial pull of 230kN for shop fabrication. Also Specify Diameter of Rivets.

What are purlins ?

Purlins

Differentiate between Clear Span, Effective Span & Total span of a beam with the help of sketches.

What are disadvantages of welding?

Disadvantages of welding

What are laterally restrained beams? Explain with Sketches ?

beams

How depth of Masonry wall foundation is decided?

#### STEEL STRUCTURES DESIGN

6th Diploma/Civil/5130/May 2019 Click Here

## STEEL STRUCTURES DESIGN

6th Diploma/Civil/5130/May 2019

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https://www.youtube.com/watch?v=UHX6f8TIvX8https://www.youtube.com/watch?v=M_RR6LVICp0https://www.youtube.com/watch?v=mV41CMWonN4https://www.youtube.com/watch?v=s0LVPE0Q3LE&list=PLA9Q9SDZ781WXNAWit379A4CRLMvjGiUw&index=14&t=0s

### Section c STEEL STRUCTURES DESIGN

6th Diploma/Civil/5130/May 2019

Design a simply supported beam of span 4.0 m to carry a superimposed load of 55 kN/m inclusive of its self-weight. The beam is laterally restrained throughout its length.(Assume missing Data)

Write about various components of Roof Trusses.

Various components of Roof Trusses.

Design a Single angle discontinue strut of 2.0 m length to carry an axial compressive load of 100 kN. With welded end connection using 10mm gusset plate

Design a 2.5m long Single angle section to act as tension member subjected to a tensile load of 160kN. With Shop Riveted (PDSR) Connections at end. Assume thickness of gusset.

Calculate the efficiency of Joint shown in Figure A. for shop Fabrication.