T/A Roy Harrison & Associates

• Darwin Airport, Terminal Building: a two storey building with arched concourse, designed for cyclonic winds supported on pad bases founded in made up ground. Wind pressures were interpolated from model test results.• “The Powerhouse” Basketball Stadium, Beverley: a three court stadium bridged by 3.5 metre deep trussed portals spanning 80 metres with a clearance of 7 metres, on a system of piles designed to resist lateral forces from the retaining walls and portals. The building was… Show more • Darwin Airport, Terminal Building: a two storey building with arched concourse, designed for cyclonic winds supported on pad bases founded in made up ground. Wind pressures were interpolated from model test results.• “The Powerhouse” Basketball Stadium, Beverley: a three court stadium bridged by 3.5 metre deep trussed portals spanning 80 metres with a clearance of 7 metres, on a system of piles designed to resist lateral forces from the retaining walls and portals. The building was founded in a reclaimed refuse dump with potential gas leakage, mitigated by excavating down to natural soils and isolating the building area using a clay blanket. Show less

Engineer Class 3, Hydraulics, Design Services Branch. Responsibilities included :• Happy Valley Water Filtration Plant :hydraulic model testing of sumps for the Filtered Water Pumping Station to identify and eliminate detrimental features in the pumping sumps; promote features conducive to optimum or, at worst, satisfactory pump performance; detailed hydraulic design of filters, flocculation and sedimentation tanks, backwash and sludge disposal systems, flows and hydraulic… Show more Engineer Class 3, Hydraulics, Design Services Branch. Responsibilities included :• Happy Valley Water Filtration Plant :hydraulic model testing of sumps for the Filtered Water Pumping Station to identify and eliminate detrimental features in the pumping sumps; promote features conducive to optimum or, at worst, satisfactory pump performance; detailed hydraulic design of filters, flocculation and sedimentation tanks, backwash and sludge disposal systems, flows and hydraulic profile for the plant; large scale flow conditioners in the raw water main to improve the velocity profile at the primary magnetic flow meter; chemical dosing systems involving a novel, inline, alum dosing system integral with the flow conditioner, and multiple injector chlorination systems. Included reporting on existing dosing facilities.• Port McDonnell town water amelioration: assessment of annual consumption, peak ratios and balancing storage requirements; estimation of yield and hydraulic performance of a new artesian bore, head loss, maximum flow, draw-down characteristics and lead time prior to boosting.• Warren, Tailem Bend and Swan Reach Chloramination: hydraulic design of injection systems for the chloramine disinfection program. Show less

Responsibilities included the structural design of commercial developments for :• Grange 18 speculative factory units: the plastic design of a large span portal incorporating a flexible layout to facilitate subdivision into variable size units for sub-letting.• Risley 14 speculative office development: preliminary design of a two storey, deep space structure with optimal structural and service layout for sub-letting flexibility.

Responsible for the design, detailing and inspection of:University of Zambia, School of Mines: a three storey administration building, two storey laboratory building and an auditorium link block; of reinforced concrete framing and composite asbestos troughed flooring construction, clad with brickwork, on a system of mass concrete piers founded in weathered limestone. Designed in a climate of limited resources and materials.

Design, Detail and Manufacturing of pre-stressed Precast Concrete Flooring Systems