We strongly believe in protecting and restoring existing structures for future benefits. Having the right team of professionals who can not only assess existing structural conditions, but able to integrate cost-benefit analysis in their decision making process is vital to the client and broader community. Over rehabilitation experience in the parking industry is reflective of this mindset.
Multi-million dollar decisions should not be based on assumptions and speculations, but with appropriate information/data gathered through the Due Diligence process. The professionals at Cohesive Engineering have numerous years of experience completing Due Diligence of existing parking structures. This information is important in developing Net Present Value for sale/purchase of existing facilities. The Due Diligence report also provides information on Immediate, Short-term and Long-term repair and preventive maintenance. Due Diligence are always required to be completed on a fast-track basis, thus the need for a fast turn-around with field review, cost estimates and the final report. Our professionals are very prepared to meet these expectations.
The evaluation/assessment of existing structure requires intensive knowledge of structural design and material behavior wrapped with years of rehabilitation experience. Parking structure condition assessments/review are typically completed via a combination of Visual Observations, Non-destructive Applications (chain dragging, GPR and hammer sounding) and or Destructive Testing (concrete core extraction, chloride ion sampling, etc.). Condition assessments/reviews are completed to determine the overall condition of the structure for structural integrity, deterioration (concrete, steel and waterproofing items such as; sealants, expansion joints, deck coating, etc.) and estimated cost for repair, protection and budgeting.
Rehabilitation of existing structures is important to long-term durability and performance of the structure. Rehabilitation/restoration is not only used to address structural deterioration and waterproofing failures, but can be used to improve aesthetics and capacity (vertical or horizontal expansion, increase in load carrying capacity, etc.). The professionals at Cohesive Engineering have strong understanding and experience in the development of restoration programs for various existing structures, such as; parking decks, pedestrian bridges, storage vessels, etc. Our restoration/rehabilitation process includes; preparation of Construction Documents (repair drawings and project specifications) Bidding (selection of qualified rehabilitation contractors and bid evaluation) and Construction Administration (period onsite review, submittals review, progress meeting, pay application reviews, etc.).
Plaza systems are constructed with various types of concrete, steel, pavers, bricks, waterproofing items and architectural elements. Plazas mainly serves as a gathering area and are usually provided over occupied spaces when constructed in parking facilities or other commercial structures. A strong understanding of plaza design and environmental impact of the plaza performance is vital to completing assessment and rehabilitation of plazas. The main issue relating to plaza systems is leaks into the occupied space below. Material selection (pavers, concrete, waterproofing membrane), types of drains (surface drain verses bi-level drains) and drain locations are two of the many elements that has to be carefully studies when considering design or rehabilitation of plaza systems.
The professionals at Cohesive Engineering are considered experts in the field of structural strengthening, especially pertaining to the utilization of composite materials (carbon fibre and glass fibre sheets) and steel strengthening, and external post-tensioning. Structural strengthening is typically required to improve/store structural integrity and increase member load carrying capacity. Strengthening with composite material such as carbon fibre sheets are helpful when repair space is limited (area has numerous conduits, fire suppression system, limited clearance, etc.) and replacement of existing structural reinforcing are not practical. The type of the strengthening application is dependent of numerous factors, such as; fire, capacity increase required, operating environment and application condition.