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The purpose of this chapter is to promote public safety and welfare by reducing the risk of death or injury that may result from the effects of earthquakes on existing unreinforced masonry bearing wall buildings. The provisions of this chapter are intended as minimum standards for structural seismic resistance and established primarily to reduce the risk of life loss or injury. Compliance with these provisions will not necessarily prevent loss of life or injury, or prevent earthquake damage to rehabilitated buildings. (Ord. 5921 § 1, 1991) Section 16.17.020 Scope. The provisions of this chapter shall apply to all existing buildings having at least one unreinforced masonry bearing wall. Except as provided herein, all other provisions of the Building Code shall apply. Exceptions: 1. Detached one-or two-family dwellings and detached apartment houses containing less than five dwelling units and used solely for residential purposes. 2. Wood framed structures two stories or less in height supported by unreinforced masonry foundation walls of less than thirty inches in height. 3. This chapter shall not apply to "Essential facilities" and "Hazardous facilities" as defined in Table No. 23-K of the Building Code. 4. Buildings such as warehouses, mausoleums, crypts, or other similar structures where human occupancy is low and infrequent as determined by the Building Official. This chapter does not require alteration of existing electrical, plumbing, mechanical or fire safety systems unless they are removed or altered during the seismic retrofit process. (Ord. 5921 § 1, 1991) Section 16.17.025 Definitions. For the purpose of this chapter, the applicable definitions in the Building Code shall also apply. "Collar joint" is the vertical space between adjacent wythes and may contain mortar. "Crosswall" is a wall that meets the requirements of Section 16.17.055(D)(3).

This paper presents design and materials considerations involved in the production of large, free standing glass reinforced plastic (GRP) industrial stacks. Because of large wind loads, such stacks must be designed with sophisticated structural analysis techniques, especially at load transfer points. This paper details such considerations for the world's tallest GRP stack.

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