steel design columns beams roof trusses plate girders connections construction - One Line Questions

1. According to IS 800:2007, what is the maximum permissible slenderness ratio for a main member carrying compressive loads? — 180
2. What is a 'web splice' in a plate girder? — A connection made in the web plate to join two sections end-to-end
3. What is a 'moment resisting connection'? — A connection designed to transfer and resist bending moments in addition to shear and axial forces
4. What is a 'moment frame' in steel construction? — A frame where beam-to-column connections are rigid (moment resisting), allowing the frame to resist lateral loads through flexure of its members
5. A typical roof truss consists of members arranged in: — Triangular units
6. What is a 'battens' system in built-up steel columns? — A system of flat plates connecting two vertical components
7. What is a 'fillet weld'? — A weld deposited in a corner formed by two surfaces at approximately right angles
8. What is a 'biaxial bending' scenario for a steel member? — Bending about two perpendicular principal axes simultaneously
9. Which type of connection is generally considered more rigid and can transfer bending moments? — Welded connection
10. Which failure mode is typically associated with short, stocky steel columns under axial compression? — Yielding
11. What is 'lateral torsional buckling' in a steel beam? — Buckling of the beam in a direction perpendicular to its plane of bending, accompanied by twisting
12. Which formula is commonly used to calculate the design compressive strength of a steel column based on IS 800:2007? — The formula incorporating the design stress and effective area
13. What is 'web crippling' in a steel beam? — Buckling of the web under concentrated loads or reactions
14. Which method is commonly used for analyzing forces in truss members? — Method of Joints and Method of Sections
15. What is the primary advantage of using steel as a construction material? — High strength-to-weight ratio, ductility, and predictability
16. What is the main challenge in designing plate girders compared to rolled steel beams? — Potential for web buckling and the need for intermediate stiffeners
17. What is the main difference between hot-rolled and cold-formed steel sections? — Hot-rolled sections are formed by passing steel through rollers at high temperatures, resulting in rounded corners, while cold-formed sections are shaped at ambient temperature, often resulting in sharper corners and increased yield strength.
18. Which method of fire protection for steel involves encasing the steel member with a material like concrete or gypsum board? — All of the above
19. Which factor influences the design bending strength of a steel beam? — Its yield strength and section properties, and susceptibility to lateral torsional buckling
20. What is the effective length of a steel column fixed at both ends and having no restraint against rotation? — 0.67L
21. What are 'purlins' in a roof structure? — Members that span between trusses and support the roofing sheets or panels
22. What is a 'pin-jointed' assumption for truss analysis? — Joints are assumed to be smooth pins, allowing free rotation, and only axial forces exist in members
23. What is 'corrosion protection' for steel structures? — Applying coatings like galvanization or specialized paints to prevent rust and degradation
24. What is a common method for ensuring the stability of a steel frame during construction? — Using temporary bracing and sequencing of erection
25. What are 'plate girders' primarily used for in steel structures? — Long spans requiring high bending resistance
26. Which type of steel column is most efficient for resisting high axial loads? — Built-up section
27. Which type of steel beam is most commonly used in building construction due to its efficiency in resisting bending and shear? — Rolled steel I-section (Universal Beam)
28. What is the maximum permissible deflection for a simply supported steel beam under service loads, as per general guidelines? — Span/250
29. What type of stress do the top chord members of a simply supported roof truss typically experience? — Compression
30. What type of stress do the bottom chord members of a simply supported roof truss typically experience? — Tension
31. What is the primary failure mode considered for bolts in a shear connection? — Shear failure of the bolt shank
32. What is 'slip resistance' in bolted connections, particularly for high-strength bolts? — The resistance to relative movement between connected parts due to friction between the faying surfaces
33. What does 'ductility' mean for structural steel? — The ability of the material to undergo significant plastic deformation before fracture
34. What is 'erection tolerance' in steel construction? — The acceptable deviation from the designed dimensions or positions of erected steel members
35. What is 'shop fabrication' in steel construction? — The manufacturing of steel components in a controlled factory environment
36. What is the throat thickness of a fillet weld? — The perpendicular distance from the root of the weld to the face of the weld
37. What is 'site erection' in steel construction? — The process of assembling and erecting fabricated steel members at the construction site
38. What is 'slenderness ratio' in the context of steel columns? — The ratio of the column's effective length to its radius of gyration
39. What is the role of 'web members' (verticals and diagonals) in a roof truss? — To resist shear forces and stabilize the chords against buckling
40. What is the primary function of connections in steel structures? — To transfer forces and moments between structural members, ensuring the integrity of the structure
41. What is the purpose of 'stiffeners' in a steel beam? — To prevent or delay local buckling of flanges and web, and web crippling
42. What is the purpose of intermediate stiffeners in a plate girder? — To prevent or reduce web buckling due to shear forces
43. What is the purpose of lacing in built-up steel columns? — To provide lateral support to the individual components and prevent local buckling
44. What is the purpose of 'fireproofing' in steel construction? — To protect steel members from significant loss of strength and stiffness during a fire, extending the time before structural collapse
45. What is the primary function of a steel beam in a building structure? — To transfer shear forces and bending moments from slabs to columns or walls
46. What is the primary function of a steel column in a building structure? — To transfer axial loads from beams and slabs to the foundation
47. What is the primary function of roof trusses in steel structures? — To span large distances and support roof loads, transferring them to the main structure
48. A plate girder typically consists of: — Two flange plates and a single web plate
49. In IS 800:2007, what is the condition for a beam to be considered 'laterally supported' and not prone to lateral torsional buckling? — When the compression flange is continuously braced
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