Cork Institute of Technology
Bachelor of Engineering (Honours) in Structural Engineering – Stage 2
(Bachelor of Engineering in Structural Engineering – Stage 2)
(NFQ – Level 8)
Autumn 2005
Structural Design & Detailing I
(Time: 4 Hours)
Instructions:
1. The examination is intended as a test of the
candidate’s:
(a) knowledge of structural calculations
(b) understanding of design principles
(c) ability to track loads through a building
(d) ability to design
(e) ability to present a design as a detailed
drawing suitable for construction
purposes
Candidates may refer to design code extracts
and approved design aids.
2. Attempt any two questions from Section A.
Answer all questions in Section B.
3. Use separate answer books for each Section.
Examiners:
Dr. J.D.Murphy
Mr. D.J. Walsh
Mr. T. Corcoran
Prof. P. O’Donoghue
Section A – Reinforced Concrete (Answer any two questions from this section)
QA1. (a) Discuss, briefly, the concepts of balanced, under-reinforced and over-reinforced
concrete sections. Your answer should include a description of the failure mode of each
section type. (5marks)
(b) Reinforcement details for a simply supported beam are shown in Fig.A1. Material
details are also given. In addition to its own weight, the beam will carry uniformly
distributed characteristic dead and imposed loads of 20 kN/m and 18 kN/m respectively.
(i) From consideration of bending only, determine the maximum simply supported span
for which the beam may be used. (9marks)
(ii) Does this span satisfy the requirements of BS8110 in relation to deflection?
(2marks)
(iii) From consideration of shear only, determine the maximum simply supported span
for which the beam may be used. (9marks)
(Total QA1. 25 marks)
