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24-Bld-A2 Elementary Structural Design: December 2017

Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)

  1. Question 1 Moments of resistance of a built-up Z-section
  2. Question 2 Eccentrically loaded round HSS pole column
  3. Question 3 Beam ABD on a shear connection and a steel tie
  4. Question 4 T-beam design for an overhanging concrete beam
  5. Question 5 Reinforced concrete column ABC in a determinate portal frame
  6. Question 6 Capacity of a triple-T reinforced concrete beam
  7. Question 7 Glulam timber column ABC for a farm building

Start with Question 1 →

National Examinations December 2017 — 07-Bld-A2 Elementary Structural Design, 3 hours, closed book (handbooks/textbooks permitted). Answer five: two of Questions A1–A3, two of B1–B3, and the one question C1 (this solution set, per pipeline convention, answers all seven). All loads shown in the exam are unfactored.

Reference texts: CSA S16:19, Design of Steel Structures; Salmon & Johnson, Steel Structures: Design and Behavior; CSA A23.3:19, Design of Concrete Structures; MacGregor & Bartlett, Reinforced Concrete: Mechanics and Design; CSA O86:19, Engineering Design in Wood; Canadian Wood Council, Wood Design Manual.

Check – assumptions applied throughout this solution set (the exam gives unfactored loads without separating dead/live, per Note 6, and instructs "assume any other data required"):

  • All specified (unfactored) loads are factored by a single combined load factor of 1.5 for ULS design, consistent with treating an undifferentiated load as governed by the live-load-dominant NBCC combination.
  • Material grades: structural steel plate/tie/beam – G40.21 350W (Fy=350 MPa); concrete f’c=35 MPa, reinforcement fy=400 MPa (as given for B1–B3); glulam – Douglas Fir-Larch 20f-E (fb=25.6 MPa, fc=30.2 MPa, E=12400 MPa, E05=9500 MPa, per CSA O86/Wood Design Manual).
  • Concrete cover/bar placement (exact stirrup and layer detail not dimensioned on the exam figures) is assumed at a standard 40–50 mm clear cover, giving effective depths stated with each question.