Pedelta - Laserfiche WebLink

Home Browse Search

: PEDELTA MAINTENANCE, ACCESSIBILITY, AND SECURITY Lifecycle Cost Comparison Stainless Steel vs Carbon Steel One of the key points to consider when evaluating between the Carbon and Stainless Steel option from an investment perspective, is to look at the lifecycle costs which includes all anticipated maintenance costs. The maintenance requirements for Stainless Steel structures is limited to regular pressure washing with water to clean the structure from marine air -salt accumulation as the duplex Stainless Steel grades proposed for this project ensures a high corrosion resistance. In addition, Stainless Steel is particularly beneficial for structures with significant maintenance constraints such as bridges over heavily traveled roadways and railways as it will eliminate the need of major associated costs (workers protection, traffic closures and detours, etc.) and indirect cost caused to the users during repair proceedings. On the other hand, Carbon Steel structures face significantly higher maintenance costs as follows: • Regular moderate maintenance required to re -paint corrosion spots every few years. • 3-4 major bridge repainting operations are usually expected during the design lifespan of the bridges (75 years). • The major repainting operations will require the removal of base painting and blast cleaning of rust immediately prior to paint application. • Repainting will be done at short nighttime possessions to avoid interference with Collins Avenue traffic. • Blast cleaning is a hazardous operation. All works shall be conducted to comply with applicable insurance underwriting, and safety and environmental requirements. Repainting will likely require fully contained environment to capture all debris for safe and health removal and workers protection over Collins Avenue. • Major maintenance operations will require engineering services for the repairing project, contract administration services, permit fees, inspection, and quality control. • Indirect cost for both the Owner (communication requirement related to detours or potential roadway impacts) and the end-users (inconvenience of closed bridges/detours). Accessibility The alignment and elevation of the path provides the necessary clearances and slopes to ensure universal access. Railings provide safety and comfort to both pedestrians and cyclists. All components of the project comply with the most stringent accessibility guidelines, including the American with Disabilities Act ADA and FDOT standards for path design. This crossing should be a showcase for universal access - consequently our design approach is to provide a path of travel and access that is convenient and comfortable for everyone in society to use, including the elderly, people with disabilities (on foot and using mobility devices), young children, parents with strollers, cyclists, skaters, skateboarders etc. For this reason, we include stair access and panoramic elevators both sides so as to maintain open sight lines and a clear reading of the Samson Ocean Park as an open, flat plane. Railings on the bridge are 8 ft high and 42 -in on stairs and amphitheater. Handrails are provided on all railings for the comfort and convenience of pedestrians. All access will meet current accessibility standards (ADA) and have been designed to reflect Crime Prevention Through Environmental Design ("CPTED") principles (further detail provided below). City of Sunny Isles Beach Request for Qualifications No. 20-10-01 -20-