RFQ 19FR6324Q0052 - Attachment 1 - Scope of work.pdf

19FR6324Q0052 – Attachment 1 – Scope of Work

I – General

The US Embassy, Paris-France (USG) requires stone repair of balcony at the first floor of CGR , located at 7 rue Brahms 67000 Strasbourg, which falls withing a United Nations educational , Scientific, and Cultural organization (UNESCO) boundary. The property on the U.S. Department of State’s Secretary of State’s Register for Culturally Significant Property. The works shall be done as per drawings, scope of work, specifications and general contract conditions. This project requires an experienced contractor with historic masonry repairs to execute the works. The contractor shall have at least 5 years of experience and a minimum of 3 projects of similar repairs at heritage sites. The contractor shall provide previous examples of their work with references. The contractor shall have a Qualibat qualification number MH2194 for “restoration of cut stone and masonry of historic monuments”.

The Contractor shall provide all labor, material, tools, equipment, supervision and other related items required to complete the works as per scope of work, specifications and attached drawings. Contractors are advised to visit the site and verify the existing site conditions to develop their proposal.

Prior to any work, the Contractor shall provide mock-ups of representative repairs for approval

For all kind of work, shall be provided a “Safety and health protection plan” or PP SPS – Plan particulier de sécurité et de protection de la santé –

The working hours shall be from 9:00 to 12:00 and from 13:00 to 17:00 Monday to Friday. During American and French holidays the U.S. Government Property shall be closed. The U.S. Government Property shall be occupied during the works and the contractor shall take all necessary measures to avoid disturbances and nuisances to occupants.

All work shall comply with all applicable French and European building regulations.

All work shall be performed in accordance with:

A. The safety requirements of the EM-385-1-1 http://www.publications.usace.army.mil/Portals/76/Publications/EngineerManu als/EM_385-1-1.pdf;

B. The safety requirements within the Occupational Safety and Health Standards https://www.osha.gov/pls/oshaweb/owastand.display_standard_group?p_toc_ level=1&p_part_number=1910;

C. Local French occupational safety and health requirement laws and regulations;

D. When there is a difference with the minimum requirements the more stringent requirement shall be followed.

E. Secretary of the Interior Standard’s and/or local regulations for work on heritage properties, whichever is more stringent.

Works duration : 3 weeks

II- Cleaning

The Contractor shall:

- Provide temporary protectives measures to protect adjacent elements and surfaces not included in this scope of work

- Furnish and install a scaffolding for balcony access

- Clean the columns, capitals, balcony thickness, balustrade (two sides) and ground floor balustrade.

Note: the contractor shall provide testing at discrete, small-scale, inconspicuous areas first to determine appropriate parameters and media for cleaning. Contractor shall then provide mock-ups for COR review and acceptance Cleaning by fine hydro-abrasion blasting (= hydrosanding / hydrogommage) or dry micro-abrasion (microsanding):

Projection of powders of different types and hardness on the support using a compressor and a nozzle (very noisy). The powders are sprayed dry, with compressed air ( not exceed 50 psi /3.5 bar at the nozzle), with water depending on the nature of the material.

The contractor shall use the gentlest most effective means for cleaning.

III - Demolition

- Provide temporary protectives measures to protect adjacent elements and surfaces not included in this scope of work

- Furnish and install a scaffolding for balcony access

- Remove the stone tiles and store properly for reuse

- Remove the stone baseboards and store properly for reuse

- Remove, by grinding and by coring, all corroded steel inserts in stone hand railing, pilasters and base of balusters and dispose debris away from the Property

- Remove non adherent stones parts and dispose debris away from the Property

- Remove all deteriorated joints preserving existing profiles and arises of stone units and dispose debris away from the Property

- Clean the surface with air

IV – Stone repair

For repair less than 10 cm :

- Use an NHL 3.5 mortar. Inorganic pigments may be added for color matching at a maximum of 10%by weight of the binder. Mortar shall be applied in lifts not to exceed 5cm in thickness and/or according to the manufacturer’s specifications. In lieu of a bonding agent, a mortar slurry may be applied to the substrate prior to packing in patching mortar Note: the contractor shall provide products from Weber or equal

For repair more than 10cm :

- carry out an engraving of 6cm thickness and dispose of debris away from the Property

- cut a stone of the same nature as the existing one in order to fill the part to be repaired

- furnish and apply stone mortar type same above (NHL 3.5 mortar pigmented to match the stone) from Weber or equal

For the crack on handrailing:

- Provide kerf cut to insert non-ferrous pins, typical two locations

- Furnish and install (2) x10mm diameter x25cm all thread (centered) and set up in a repair mortar (NHL 3.5 mortar)

- grease one end of each rod or put it in a sleeve at one of the bearings. The grease and or sleeves need to be on the same side for both rods.

- at the crack, furnish and apply injection grout Injection grout:

2 parts NHL 2.0.

1 part clean mason’s sand (sieved <300 microns) 1 part ceramic microspheres (<300 microns) 10% (v/v) acrylic emulsion in filtered water (Rhoplex E-330, Primal AC 33 or equal)

- reinstall stone tiles and baseboard after waterproofing repair

- Clean work area

- Remove the scaffolding