OBC Building Structural case studies
OBC Building Structural · Put your knowledge to work in context.
The OBC Building Structural examination is a qualification assessment for practitioners who design or review the structural components of buildings regulated by the Ontario Building Code. It is typically taken by building officials seeking registration in the structural category, by designers and consultants who must demonstrate code competence, and by experienced technologists and engineers broadening their credentials. The OBC Building Structural case studies are 5 cases and about 2,611 words.
1Clinic Addition on a 1962 Concrete Frame: Snow Drift or Drift-Free?
A single-storey 1962 reinforced concrete clinic in a northern city (ground snow load 2.1 kPa, specified 1-in-50) is being extended with a 6 m wide, 4 m tall mechanical penthouse placed 1.5 m back from the high-roof edge. The existing roof is nominally flat (slope 1:50) with a parapet 0.9 m high; the penthouse roof is flat.
568 words, about 3 min2Multi-Storey Timber Frame: When Does Wind-Governed Uplift Change the Hold-Down Design?
A four-storey residential building uses a light timber frame with 38 x 140 mm studs at 400 mm centres, sheathed with 9 mm OSB on one side. The site is exposed coastal (basic wind velocity 27 m/s, terrain category 2).
552 words, about 3 min3Masonry Cavity Wall: Restrained vs Unrestrained Slenderness in a Warehouse
A single-storey warehouse has 8 m high external walls of 190 mm concrete blockwork, unreinforced, with a 50 mm cavity and 100 mm facing brick. The walls are supported at the base by a reinforced concrete ground beam and at the top by a steel roof structure.
545 words, about 3 min4Steel Portal Frame: Connection Stiffness and the Assumption of Pinned Bases
A 24 m span steel portal frame warehouse has 610 x 229 mm rafters and 406 x 178 mm columns. The designer has assumed pinned bases in the global analysis, giving a sway stiffness that depends entirely on the frame action.
493 words, about 2 min5Foundation on Variable Fill: Bearing Capacity vs Settlement Control
A two-storey office building is to be founded on a site where a 3 m deep layer of loose sandy fill overlies stiff clay. The groundwater table is 1.5 m below ground.
453 words, about 2 min