N3319120R4013 Amendment 0005.pdf

N3319120R4013 D-B Renovate Hematology Clinic, Skopje, North Macedonia

Amendment 0005

The purpose of this modification is to provide a response to pre-proposal inquiry (PPI)

QUESTION#1

RFP Attachment 1, Page 22 of 114, 3.6. STRUCTURE AND BASIS OF DESIGN FOR NEW CONSTRUCTION says that “it can be concluded that there are fitting conditions for construction of an additional story at the existing building of the РНІ Clinic for hematology -Skopje.” Furthermore, the report of IZIIS (Institute of Earthquake Engineering and Engineering Seismology of North Macedonia) that is in Macedonian language and provided by the Amendment 2 clearly states that the building is built before 1981 (that is the year when the building regulations are changed) and it is a building with limited and unknown load capacity which is crucial in determining its stability today. Furthermore the report states that in order to build an additional floor the new regulations apply. That is to say, there is a need of a detailed analysis of the structure of the building, the quality of building materials as well as geotechnical and other analysis on the building site. In the end it is clearly stated that you can determine the most suitable construction method only after all these analysis are done, and there can be 3 possible cases:

1. Building without any reinforcement of the construction elements of the existing parts,

2. Building with reconstruction of the building elements of the existing parts as needed

3. Building with an outer independent construction system not affecting the existing building construction elements vertically and horizontally

Nevertheless, It is our understanding that NAVFAC request competitors to prepare their proposals considering that the additional floor will be constructed on the roof of the existing structure without any reinforcement applied to the existing structural system and if after the award and during the detailed design stage, a necessity to make such a reinforcement arises, as described in the IZIIS report item 2 and 3 given above, then the resulting time and cost impact will be a subject of a modification. We Kindly request for your confirmation, if not further explanation.

ANSWER:

As stated in paragraph 1.5 of the Performance Technical Specifications, the company that receives the award of the contract shall hire the services of architect/engineers licensed in North Macedonia to design all construction works included in the contract. This company needs to be familiar with the administrative procedures necessary for the competent authorities to be able to receive and accept the different documents, in order to obtain all the necessary permits and authorizations. This includes the structure of the new floor and its supporting base.

The analysis of the existing structure of the building, the quality of building materials as well the geotechnical analysis on the building site is something required by law in North Macedonia and the company that receives the award is required, as part of this contract, to prepare and submit together with the Project for Construction Statics to IZIIS (Institute of Earthquake Engineering and Engineering Seismology of North Macedonia) in order to obtain approval. This agency needs to review and validate elements such as projected degree of mechanical resistance, stability and seismic protection (MPS). This documents and reports are parts of the design itself which is obligation of the future Contractor.

Based on this question, the Ministry of Health requested additional expert opinion from a Professor from the Faculty of Civil Engineering, University "Cyril and Methodious" who confirmed this information.

The company that receives the award of the contract shall perform all necessary testing, inspection, calculations and designs in order to provide a new floor on top of the existing building. The amount of reinforcement is a function of the building condition, but also of the type of construction elements to be selected for the new floor. Consequently the design of the potential reinforcement of the building cannot be estimated without the design/weight of the new construction.

For estimating purposes, from a qualitative aspect the offerors shall assume alternative 2: “Building with reconstruction of the building elements of the existing parts as needed”. From quantitative aspect, the offerors shall assume reinforcement on 60% of the building structure to increase the load bearing capacity of the existing structure to support the additional weight represented by the additional floor. Less than 60% reinforcement is acceptable if, and only if, the full design package is approved as per regulations of North Macedonia.

However, the design or the reinforcement of the existing structure and the design of the structure of the new floor shall be a single design. The contractor shall also assume light weight construction for additional floor, as much as technically possible.

The general basis of design shall be full compliance with regulations of North Macedonia, with special emphasis on the strict seismic requirements.

It is a requirement of this contract to obtain IZIIS approval on the design and their approval on the execution of the works and their approval on the completed works.

As stated in paragraph 4.14, no payment shall be authorized for design until the company who receives the award provides a copy (paper and digital) of the full construction project, together with the corresponding Construction Permit.

The company that receives the award shall include a line item in the Schedule of Prices for minimum 4% of the contract value for “IZIIS Approval of Completed Works” that shall be paid only after IZIIS provides the final acceptance on the completed works.