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This paper describes a study of the seismic behaviour of taller eccentrically braced frames (EBFs). Chevron-type EBFs with shear-critical links are designed for 14-, 20-, and 25-storey buildings in Montreal and Vancouver. For each location the importance of different design criteria is discussed and an appropriate design sequence is proposed. It was found that ductility requirements did not control design. For Vancouver, buildings member selection was mostly influenced by the inelastic inter-storey drift requirements whereas for Montreal ensuring the global frame stability was critical. The seismic response of these frames to the sets of earthquake records calibrated to match design spectra is described. The seismic performance for Vancouver frames was found to be adequate, except that in the upper storeys the inelastic link deformations and shear forces exceeded values anticipated in design. For the Montreal structures, all global and local response indicators remained well below the design limits. [ABSTRACT FROM AUTHOR]

Legislation that prevents the hiring of temporary replacement workers during a work stoppage is controversial. "Anti-temporary replacement worker" legislation (ATR) or "anti-scab" legislation is currently in effect in Quebec and British Columbia and existed for a short period of time in Ontario. This paper uses variation over time (1978-2003) and across provinces to provide empirical evidence concerning the impact of ATR on work stoppages. The results show that ATR increases strike incidence and decreases strike length-both effects are statistically significant and substantial in magnitude. Incidence and length have opposing effects on days lost to work stoppages. Empirical results provide weak evidence that anti-scab legislation may increase days lost to work stoppages in the first two years after the legislation takes effect but no evidence that such legislation has a statistically significant effect on days lost when it has been in effect for more than two years. [ABSTRACT FROM AUTHOR]