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ENCE 303Bachelor in Civil Engineering · Semester 51 Paper Available

Design of Steel Structures

Past examination question papers and complete curriculum syllabus for Design of Steel Structures (ENCE 303), Bachelor in Civil Engineering Semester 5 under Institute of Engineering (IOE), Tribhuvan University.

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Most Frequently Asked Questions

Top recurring IOE board exam questions for Design of Steel Structures with verified mark schemes, formula notation, and recurrence frequency.

Showing 30 of 30 top repeated questions

Introduction

2 Questions
#1Repeated 5 Times[4 Marks]Introduction
Explain the mechanical properties of structural steel and the advantages and disadvantages of steel as a construction material. What are the Limit States considered in IS 800:2007 (Limit State of Strength and Limit State of Serviceability)?
Appeared in:2082 Kartik2080 Chaitra2078 Chaitra2076 Baisakh2075 Bhadra
#2Repeated 3 Times[6 Marks]Introduction
Explain the Limit State Design philosophy as per IS 800:2007. Distinguish between limit states of strength and limit states of serviceability (deflection limits, vibration, durability, fire resistance).
Appeared in:2083 Baishakh2081 Bhadra2079 Chaitra

Connections in Steel Structures

7 Questions
#1Repeated 5 Times[4 Marks]Connections in Steel Structures
Explain the different failure mechanisms of bolted connections in steel structures (shear failure, bearing failure, tearing of plate, block shear failure).
Appeared in:2082 Chaitra2081 Chaitra2080 Ashwin2079 Chaitra2078 Poush
#2Repeated 5 Times[8 Marks]Connections in Steel Structures
Calculate the maximum resultant shear force developed in the critical bolt of a bracket connection subjected to an eccentric load in the plane of the connection. The bracket connection consists of M20 grade 4.6 bolts arranged with an edge distance of 30 mm and pitch of 50 mm, carrying 250 kN at an eccentricity of 250 mm.
Appeared in:2082 Chaitra2082 Kartik2080 Chaitra2078 Chaitra2076 Bhadra
#3Repeated 5 Times[6 Marks]Connections in Steel Structures
Design a lap connection to join two plates of size 200 mm x 10 mm of grade Fe410 steel to mobilize the full tensile strength of the plates using shop/field fillet welds.
Appeared in:2082 Chaitra2081 Ashwin2079 Ashwin2077 Chaitra2075 Bhadra
#4Repeated 4 Times[8 Marks]Connections in Steel Structures
Design an eccentric welded bracket connection to carry a factored load of 150 kN acting at an eccentricity of 150 mm perpendicular to the plane of the weld (out-of-plane bending).
Appeared in:2082 Kartik2080 Ashwin2078 Chaitra2076 Baisakh
#5Repeated 4 Times[6 Marks]Connections in Steel Structures
Differentiate between bearing type bolts (Grade 4.6) and High Strength Friction Grip (HSFG Grade 8.8 / 10.9) bolts. Explain the slip-critical mechanism, proof load, and slip resistance formula $V_{dsf} = \frac{\mu_f n_e K_h F_o}{\gamma_{mf}}$.
Appeared in:2082 Bhadra2080 Chaitra2077 Magh2075 Bhadra
#6Repeated 3 Times[8 Marks]Connections in Steel Structures
Design a welded lap splice to connect two steel tie plates of width $180\text{ mm}$ and thicknesses $12\text{ mm}$ and $10\text{ mm}$ subjected to a factored tensile load of $250\text{ kN}$ using Fe 410 steel and fillet welds on three sides.
Appeared in:2082 Chaitra2080 Baishakh2078 Bhadra
#7Repeated 3 Times[6 Marks]Connections in Steel Structures
What is prying action in bolted connections? Explain how prying force ($Q$) is generated in tension flange connections and write down the codal provisions to determine the prying force as per IS 800:2007.
Appeared in:2083 Baishakh2081 Chaitra2079 Baishakh

Tension Members

5 Questions
#1Repeated 5 Times[6 Marks]Tension Members
Explain the design strength of a tension member as governed by: (i) yielding of gross section, (ii) rupture of critical section, and (iii) block shear failure as per IS 800:2007.
Appeared in:2081 Chaitra2080 Chaitra2078 Poush2076 Bhadra2074
#2Repeated 5 Times[8 Marks]Tension Members
A diagonal member of a roof truss carries a maximum pull of 300 kN. Design the section and its connection with a 12 mm thick gusset plate. The length of the connection is limited to 350 mm. The steel is of grade Fe410 and bolts of grade 4.6 are used. Check for block shear failure.
Appeared in:2082 Chaitra2082 Kartik2081 Ashwin2079 Chaitra2075 Bhadra
#3Repeated 4 Times[4 Marks]Tension Members
What is a lug angle? Explain the purpose, advantages, and codal design rules for lug angles connected to angle and channel tension members as per IS 800:2007.
Appeared in:2082 Chaitra2081 Ashwin2079 Chaitra2076 Baisakh
#4Repeated 4 Times[8 Marks]Tension Members
Design an unequal angle tension member ISA $100 \times 75 \times 8\text{ mm}$ connected to a $10\text{ mm}$ gusset plate through its longer leg by fillet welding to carry a factored tensile force of $220\text{ kN}$. Check for yielding, rupture ($T_{dn}$), and block shear.
Appeared in:2082 Bhadra2081 Baishakh2078 Chaitra2076 Chaitra
#5Repeated 3 Times[6 Marks]Tension Members
Explain the shear lag phenomenon in steel tension members. How does IS 800:2007 account for shear lag in angle sections and tee sections connected through one leg?
Appeared in:2082 Chaitra2080 Chaitra2076 Chaitra

Flexure members

5 Questions
#1Repeated 5 Times[10 Marks]Flexure members
Design a simply supported laterally unrestrained steel beam having a clear span of 4.5 m, supported over masonry walls of 300 mm thickness. The beam carries an imposed dead load of 15 kN/m and live load of 25 kN/m. Check for flexural strength, shear capacity, web buckling, web crippling, and deflection.
Appeared in:2082 Chaitra2082 Kartik2081 Chaitra2079 Ashwin2078 Chaitra
#2Repeated 5 Times[8 Marks]Flexure members
Discuss the step-by-step procedure to proportion the web and flange plates of a welded plate girder. Explain the functions and design requirements of intermediate transverse stiffeners, end bearing stiffeners, and web splices as per IS 800:2007.
Appeared in:2082 Chaitra2081 Ashwin2080 Chaitra2078 Poush2076 Baisakh
#3Repeated 4 Times[10 Marks]Flexure members
Design a laterally supported beam of clear span $5.0\text{ m}$ carrying a uniformly distributed factored dead load of $20\text{ kN/m}$ and factored live load of $30\text{ kN/m}$. Select a suitable ISMB section and perform checks for moment capacity, shear capacity, deflection, and web buckling/crippling.
Appeared in:2083 Baishakh2082 Chaitra2080 Chaitra2076 Chaitra
#4Repeated 3 Times[8 Marks]Flexure members
Explain Lateral Torsional Buckling (LTB) of steel beams. What factors influence the elastic critical moment ($M_{cr}$)? How does IS 800:2007 evaluate the design bending compressive stress ($f_{bd}$)?
Appeared in:2081 Bhadra2079 Baishakh2077 Magh
#5Repeated 3 Times[8 Marks]Flexure members
What are the functions of intermediate transverse web stiffeners, load-carrying web stiffeners, and bearing stiffeners in a welded plate girder? Explain tension field action in thin plate girder webs.
Appeared in:2082 Bhadra2080 Baishakh2076 Bhadra

Compression members

8 Questions
#1Repeated 5 Times[5 Marks]Compression members
Explain the effective length of compression members with different boundary conditions. Explain the column buckling curves (classes a, b, c, d) adopted in IS 800:2007 based on Perry-Robertson formulation.
Appeared in:2082 Kartik2080 Chaitra2078 Chaitra2076 Baisakh2073
#2Repeated 5 Times[12 Marks]Compression members
A built-up steel column is subjected to a design axial load of 1500 kN. If the unsupported length of the column is 8 m and both ends are fixed, design the column when made up of two channel sections placed toe-to-toe with a single lacing system as per IS 800:2007.
Appeared in:2082 Chaitra2082 Kartik2081 Chaitra2080 Chaitra2078 Poush
#3Repeated 5 Times[6 Marks]Compression members
Design a slab base for an ISHB 350 column subjected to an axial compressive working load of 1000 kN. The slab base is supported over a concrete pedestal of grade M20. Design the base plate dimensions, thickness, and anchor bolts.
Appeared in:2082 Chaitra2081 Ashwin2080 Chaitra2079 Chaitra2076 Bhadra
#4Repeated 4 Times[6 Marks]Compression members
Explain the design requirements of battened compression columns. Compare lacing and battening systems with respect to lateral stiffness, distribution of transverse shear, and fabrication economy.
Appeared in:2081 Chaitra2080 Ashwin2077 Chaitra2075 Bhadra
#5Repeated 4 Times[6 Marks]Compression members
Explain the components and design procedure of a gusseted base for a steel column subjected to combined axial compression and bending moment.
Appeared in:2082 Kartik2080 Chaitra2078 Chaitra2075 Bhadra
#6Repeated 4 Times[10 Marks]Compression members
Design a built-up column consisting of two channel sections placed back-to-back with a lacing system to carry a factored axial compressive load of $1200\text{ kN}$ over an effective length of $6.0\text{ m}$.
Appeared in:2081 Chaitra2079 Chaitra2077 Magh2075 Bhadra
#7Repeated 3 Times[6 Marks]Compression members
Explain Perry-Robertson formula and the four column buckling curves (curve a, b, c, d) in IS 800:2007 based on the imperfection factor ($\alpha$). Which curve applies to hot-rolled I-sections, welded boxes, and built-up sections?
Appeared in:2083 Baishakh2081 Bhadra2077 Chaitra
#8Repeated 3 Times[6 Marks]Compression members
Explain the design of column splices for columns carrying axial load and bending moments. Differentiate between bearing splices and non-bearing splices with neat sketches.
Appeared in:2082 Bhadra2080 Baishakh2078 Chaitra

Design of Roof Trusses

3 Questions
#1Repeated 5 Times[8 Marks]Design of Roof Trusses
Determine the design wind pressure on the roof of an industrial building having height 15 m, length 40 m, and width 25 m with a roof slope of 1:2.5 as per IS 875 (Part 3) - 2015. Calculate wind forces on panel points of the truss.
Appeared in:2082 Chaitra2082 Kartik2081 Chaitra2080 Chaitra2078 Chaitra
#2Repeated 5 Times[8 Marks]Design of Roof Trusses
Design a channel/angle section purlin for a pitched roof truss carrying corrugated GI sheet roofing. Given: span of purlin = 4 m, pitch of truss = 1/4, spacing of purlins = 1.35 m, and design wind pressure = 1.2 kN/m^2. Check the section for biaxial bending and deflection.
Appeared in:2082 Kartik2081 Ashwin2080 Chaitra2079 Chaitra2076 Bhadra
#3Repeated 3 Times[8 Marks]Design of Roof Trusses
Explain the components and design considerations of gantry girders in industrial buildings: crane capacity, impact allowances, surge loads, longitudinal tractive forces, and selection of built-up channel-I sections.
Appeared in:2083 Baishakh2081 Chaitra2078 Bhadra

Curriculum Syllabus & Course Topics

Sourced from TU curriculum portal
Full Syllabus (PDF)Micro Syllabus (PDF)
Chapter-wise Units & Micro-Syllabus Topics (6 Units)

  1. 1. Introduction

    • 1.1Steel Structure: Scope; advantages and disadvantages; types of steel structures
    • 1.2Structural Steel and Classification of Steel Structures
    • 1.3Design Process and Basis for design
    • 1.4Method of Analysis and Design
    • 1.4.1Working stress method
    • 1.4.2Limit state design method: Different limit states for steel design; Design strength of materials and design loads.
    • 1.4.3Ultimate Load Method
    • 1.5Prevailing codes and standards

  2. 2. Connections in Steel Structures

    • 2.1Connection in steel structure: Importance and its type.
    • 2.2Welded connections: Welds and welding; Design of simple and eccentric welding connections.
    • 2.3Bolted connections: Bolts and bolting; Design of simple and eccentric bolting connections.
    • 2.4Riveted connections: Brief introduction

  3. 3. Tension Members

    • 3.1Tension members: Definition and type of tension members.
    • 3.2Section area of tension members.
    • 3.3Design of tension members of simple and built-up section.
    • 3.4Design of Lug angle and tension splices.

  4. 4. Flexure members

    • 4.1Steel beams and its type.
    • 4.2Design of simple beam and built-up beams.
    • 4.3Design of continuous beams.
    • 4.4Design of plate girders.
    • 4.4.1Necessity and requirements of plate girders.
    • 4.4.2Design for bending, shear, deflection and lateral stability.
    • 4.4.3Curtailment of plates.
    • 4.4.4Design of web and flanged splices.

  5. 5. Compression members

    • 5.1Types of compression members.
    • 5.2Buckling behavior of columns.
    • 5.3Design of column of simple and built-up sections.
    • 5.4Design of lateral bracing of compression members.
    • 5.5Design of eccentrically loaded columns.
    • 5.6Design of column bases.
    • 5.6.1Axially loaded column bases.
    • 5.6.2Eccentrically loaded column bases.
    • 5.7Design of column splices.

  6. 6. Design of Roof Trusses

    • 6.1Types and components of roof trusses.
    • 6.2Loads on roof trusses.
    • 6.3Wind load calculations.
    • 6.4Design of roof components.

Examination Scheme & Marks Distribution

Evaluation Structure

  • Final Board Theory Exam: 60 Marks (Pass mark: 24)
  • Internal Assessment: 40 Marks (Pass mark: 16)
  • Practical / Lab Exam: 25 or 50 Marks (Continuous lab evaluation + viva, where applicable)

* This is the general current IOE 60/40 scheme; verify course-specific details in the syllabus above.

Exam Preparation Guidelines

  • Review the available past examination paper to understand question styling, typical derivation topics, and marks allocation.
  • Cross-reference key answers with official syllabus units, standard textbooks, and lecture notes.
  • Structure answers with labeled diagrams, concise bullet points, and highlight final answers in numerical solutions.

Frequently Asked Questions (Design of Steel Structures)

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Q: What is the pass mark for Design of Steel Structures?

The general current scheme is a 60-mark final theory exam and a 40-mark internal assessment, with pass marks of 24 and 16. Verify the course-specific syllabus above.

Q: Where can I find the complete syllabus for this subject?

The available chapter-wise syllabus and topic breakdown is indexed in the Syllabus section above, with links to the curriculum PDF source.

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