A.01.38_-_Statement_of_Work.pdf

US Army Corps of Engineers Europe District

APO AE 09049

ar113

Statement of Work Kombewa Clinic Structural Repairs

Kombewa, Kisumu, Kenya

Prepared by:

Design Section

Engineering Branch 11 June 2018

01 10 10 Statement of Work Kombewa Clinic Structural Repairs

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SECTION 01 10 10

STATEMENT OF WORK

SECTION TABLE OF CONTENTS;

1 GENERAL

2 CIVIL AND GEOTECHNICAL (Not Applicable)

3 ARCHITECTURAL

4 STRUCTURAL

5 ELECTRICAL (Not Applicable) 6 MECHANICAL (Not Applicable)

ATTACHMENTS

Att. # 1 Location Map Att. # 2 As-Built Drawings Att. # 3 Conceptual Structural Drawings (S-001 & S-002) Att. # 4 Concrete Material Testing Report Att. # 5 Structural Audit Report by Gibb International Att. # 6 USACE Site Inspection Report Att. # 7 Structural Calculations Guideline

ATTACHMENTS #2 THROUGH #6 ARE FOR INFORMATION ONLY. THE GOVERNMENT IS NOT LIABLE

FOR THEIR ACCURACY, CODE COMPLIANCE OR COMPLETENESS.

1.0 GENERAL

1.1 PROJECT DESCRIPTION

The design-build project scope will include engineering and construction of structural repairs to the elevated floor slab and a concrete bond beam at one of the existing walls for the Kombewa Clinic near Kisumu, Kenya. The clinic is located in the vicinity of coordinates: Lat 0°06'13.6"S / Long 34°31'00.7"E. Refer to Attachment #1 “Project Location” for the location of the building to be renovated.

Structural investigations have indicated that the elevated floor slab and an exterior bond beam was constructed using concrete with low and inconsistent compressive strengths. Subsequently, they are exhibiting signs of structural distress. Additionally, the existing exterior concrete stairs to the elevated floor were constructed with treads and risers that do not meet code requirements.

The prescribed repairs are to add structural steel elements below the elevated floor as shown exemplified in Attachment 3. Cracks in the elevated concrete slab will be injected with epoxy. The deficient concrete bond beam in the exterior wall will be replaced. The exterior stairs will be demolished and replaced with new concrete stairs with code compliant treads and risers. Architectural finishes should take place after structural repairs have been performed.

1.2 GENERAL REQUIREMENTS

The Contractor shall deliver fully functional, turnkey type facilities (without furniture) as described in this document. The work includes but is not limited to design, demolition, fabrication, delivery, installation, construction, and site work. The facility and the installed equipment shall be permanent construction.

The facility in this project shall be complete and usable to meet codes and technical and functional requirements per this Statement of Work (SOW). All design, calculations, approvals, certificates, fees, labor, material, equipment, direct overhead, indirect overhead, G&A and general conditions to complete this project as described in the SOW shall be included in the proposal price.

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These design and product requirements are minimum requisites. Compliance with the provisions of this section by subcontractors shall be the responsibility of the Contractor.

1.3 FUNCTIONAL AREAS AND SPACE ADJACENCIES

The functional areas of the areas to be renovated shall be provided in accordance with the attached conceptual drawings and all relevant codes.

1.4 SUBMITTALS

Government approval is required for submittals with “G” designation; submittals not having a “G” are for Contractor Quality approval. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-01 Pre-construction Submittals

Demolition Plan; G

Phasing Plan; G

Inspection Plan; G

SD-05 Design Data

65% Pre-Final Design; G, DO

95% Final Design; G, DO

100% Corrected Final Design; G, DO

1.4.1 DESIGN SUBMITTALS

Provide a complete design package at each milestone, as described in Specification Section 01 33 16 DESIGN AFTER AWARD. The milestones for this project are indicated above in Section 1.4 SUBMITTALS. The specific requirements of each milestone are described in each discipline-specific section of this Specification.

The Contractor shall submit all documents in electronic format (.pdf for text and calculations, .pdf and .dwg (AutoCAD, latest version) for drawings). See Specification 01 33 00 SUBMITTAL PROCEDURES for additional information.

1.5 MATERIALS AND EQUIPMENT

Materials and products used, shall be durable, heavy duty industry standard. The equipment shall be the manufacturer’s standard quality and shall be compatible with all other equipment and materials within the system or assembly. Equipment and materials shall include all connections and accessories necessary to ensure operability and correct installation according to manufacturer’s requirements.

Each major piece of equipment shall have the manufacturer’s name, address, contact information, type or style, model or serial number, and catalog number on a plate secured to the piece of equipment. The definition of a “major piece of equipment” shall be at the discretion of the COR.

1.5.1 LIFE-SPAN

Construction must have an expected life span of 25 years.

1.5.2 MAINTAINABILITY

Low maintenance materials and systems must be employed and shall be appropriate for the project climate and location.

1.5.3 OPERABILITY

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Systems including but not limited to mechanical, electrical, communications, shall be simple to operate and easy to maintain.

1.5.4 STANDARDIZATION

The Contractor shall use standardized materials, products, equipment, and systems to minimize the requirements for replacement parts, storage facilities, and service requirements.

1.6 DESIGN DIMENSIONS

The design shall be developed using the metric system.

1.7 DESIGN CRITERIA

Project design, site facilities, utility systems and material standards shall be in accordance with the latest editions of the Host Nation and US building codes and following codes / criteria:

a. Kenya National Building Codes and Standards

b. 2015 International Building Code (IBC)

c. 2015 International Existing Building Code (IEBC)

While this RFP references various source standards and specifications, all design documents are to meet Host Nation and US codes and requirements. It is the designer's responsibility to demonstrate that the Host Nation or US standard is equal to the cited standard or specifications being supplanted. The more restrictive standards shall apply when the conflicts arise between the requirements of this RFP and any referenced or other applicable codes, standards or regulations. If equivalency cannot be met, the more stringent requirement shall be used and both codes shall be quoted verbatim in the Contractor’s correspondence to the COR. Where specific standards are not indicated, the designer shall determine the required material and execution standards.

Provide an electronic copy of the Kenya Host Nation standards and building codes in its original language as related to facility construction.

1.8 DESIGN CONFERENCES AND MEETINGS

The Contractor and the entire design team are required to participate in a design review conference for each design submittal. The Contractor may request a review conference, but the Government is under no obligation to conduct or participate in a review conference unless specifically identified in the contract documents. The Contractor shall bring the personnel that developed the design submittal to any review conference.

All design review conferences shall be held via teleconference or be reviewed and comments resolved via email.

The Contractor is responsible for taking meeting minutes during each design review conference and submitting to the COR for information and approval.

The Contractor is responsible for evaluating all Government comments prior to each design review conference. The Contractor is responsible for resolving all Government comments from each design phase. The Contractor shall provide annotated responses to each design review comment with the subsequent design submittal packages. Construction may not begin until all Government comments from all design phases have been resolved.

1.9 SPECIAL CONSTRUCTION REQUIREMENTS

1.9.1 THIRD PARTY INSPECTION SERVICES

The Contractor shall furnish an independent 3rd party inspection services to inspect Structural features of the project. This is in addition to all other Contractor Quality Control requirements. All testing shall be at the expense of the Contractor.

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1.9.1.1 GENERAL REQUIREMENTS

3rd Party inspectors shall submit professional reports directly to the COR without coordination with the Contractor within 48 hours of the actual inspection. Report will contain the following at a minimum: names of all persons present for activity, listing and approval of all related materials, description of observed activity, and 10 photos (minimum resolution: 1504x1000) of the observed activity.

1.9.1.2 THIRD PARTY STRUCTURAL ENGINEER INSPECTOR REQUIREMENTS

The Third Party Structural Engineer shall be a licensed graduate engineer with 10 years of experience, 5 years in the country where the project work is performed.

Required experience includes, but is not limited to, inspecting concrete structures, slabs, and foundations, and steel frames and structures. Furnish CV for approval by COR and USACE Europe District Technical Engineering Section Structural Engineer.

Minimum inspections to be conducted:

For all new construction (stairs and foundations) check the relative compactness of foundation soils and that no unsuitable soils exist, formwork and rebar of foundations, concrete placement of foundations, steel erection, steel bolt installation. No concrete may be placed in forms without a preceding rebar inspection report and verification of functioning vibration equipment. For the structural repair project, check installation of new supporting structural steel members, their connection to columns and their support at existing and upgraded walls. Check structural bond between the new beams and the existing ceiling slabs.

Check all required masonry replacements and upgrade for proper execution according to the contractors design. Check proper installation of any required concrete cushion to support new structural beams. Check proper installation of steel columns on new footings including verification of proper grouting at the base plates.

Engineer shall review concrete test results and sign off on strength approvals.

Engineer shall review steel shop drawings before fabrication. No field welding is permitted without approval of COR and USACE Europe District Technical Engineering Section Structural Engineer.

1.9.2 PROTECTION OF WORK AREA

1.9.2.1 DUST AND DEBRIS CONTAINMENT

The Contractor is responsible for sealing the work areas with construction barriers and dust partitions in order to contain construction dust and debris and maintain a hygienic environment in the health clinic. In addition to protections within the work area, the Contractor shall provide temporary protection for all finishes from the entrance of the facility to each work area. The Contractor is responsible for patching and repairing any damage caused during construction.

Coordinate the locations of barriers with the COR prior to the start of work.

1.9.2.2 PROTECTION OF FURNITURE, FIXTURES, AND EQUIPMENT

The Contractor shall remove all furniture and equipment from the work area and store in a protected, dry location. Protect all existing fixtures and finishes that remain within the work area. Coordinate with the COR and the User for any special handling or protection measures required for sensitive equipment. The Contractor is responsible for repairing or replacing any damage caused during construction. Either the Contractor or the COR may request to conduct a preconstruction survey of furniture, fixtures, and equipment with both the Contractor and Government representative present.

1.9.2.3 NOISE AND VIBRATION CONTROL

The Contractor shall employ demolition and construction methods that minimize the production of sound and vibration. Coordinate the schedule of especially loud or disruptive activities with the COR prior to the start of work.

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1.9.2.4 PROTECTION OF EGRESS AND LIFE SAFETY

The Contractor shall not take actions that hinder existing egress paths or disrupt operation of life safety systems without prior coordination with the COR and all applicable authorities having jurisdiction (AHJ). The Contractor is responsible for supplying signage or other protective measures as required by the COR or AHJ prior to impeding the egress path or life safety system.

1.9.2.5 SITE CLEAN UP AND DEBRIS REMOVAL

The Contractor shall perform general litter patrol in all areas associated with the work area. Responsibilities shall include, but are not limited to, the removal and disposal of all natural debris (tree limbs, dry brush, rodent habitats, insect/bird nests, dead animals, etc.), and man-made debris to an offsite location. Clean up shall be performed prior to the start of construction, at the end of each workday during construction, and after all construction activities are complete. This service shall be performed at no additional cost to the U.S.

Government.

1.9.3 CONSTRUCTION PHASING

The facility must remain fully operational during construction. The Contractor is responsible for creating a detailed Phasing Plan including a construction schedule to ensure that the facility remains fully operational during construction. The Contractor shall submit the Phasing Plan to the COR for approval prior to the start of construction activities. The Contractor must inform the COR of any variances in the schedule during construction.

END OF SECTION

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2.0 CIVIL AND GEOTECHNICAL

2.1 GEOTECHNICAL INVESTIGATION AND REPORT

Perform a geotechnical investigation and assessment of the project site to determine geotechnical parameters as required to establish the allowable soil pressure for the design and installation of the new stairs and the new foundations of the new steel columns within the building. Perform the necessary amount of testing, borings and test pits at depths suitable for the project improvements. The Geotechnical work must be performed under the supervision of a professional geotechnical engineer and the report must be signed by the Geotechnical Engineer. In the absence of Host Nation codes, perform the geotechnical investigation and report per UFC 3-220-01, Geotechnical Engineering and IBC.

Coordinate testing locations with the COR to avoid impact to existing utilities and facility operations. Utility locates, permits, pavement removal and vegetation clearing is the Contractor’s responsibility. Repair disturbed areas with a concrete patch in paved areas, and compacted soil in non-paved areas. The repaired area must be flush with the adjacent surface. Following restoration, stake and flag each of the hole locations with boring identification numbers. In paved areas, use white paint on the paved surface to mark hole locations. Provide a map indicating the borehole and test pit locations.

2.1.1 REPORT

Include, as a minimum, the following information:

a. Description of field work completed and equipment used; names, signatures and stamps of licensed professionals involved; name of drilling company.

b. Site map of borehole or test pit locations.

c. High resolution color digital photographs of each borehole and test pit location.

d. Test pit logs with classification of all subsurface materials. The logs must distinguish fill materials from native materials, include all in‐situ test results, and include groundwater depth information, if groundwater is encountered. Distinguish between bedrock and rock boulders.

e. Reports of all the field and laboratory testing.

f. Recommendations for allowable bearing capacity, expected settlement, type of foundation, minimum footing and grade beam dimensions, lateral earth pressure parameters, and minimum depth of foundation for footing and grade beams.

g. Recommendations for preparation, placement, and compaction of onsite soils, borrow material, soil replacement,

h. Calculations to support conclusions and recommendations

2.1.2 DESIGN DRAWINGS AND SPECIFICATIONS

On the design drawings and/or specifications, include geotechnical information that affect the design of the project, including but is not limited to, boring locations, boring logs, groundwater and frost depths, and any details that convey requirements for site preparation.

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3.0 ARCHITECTURAL

3.1 PROJECT DESCRIPTION

The contractor shall design and perform all architecture modifications, repairs, and touch-ups required to complete a structural retrofit of the Kombewa Medical Clinic.

The architectural renovation shall include the following items of work:

a. Protect all existing construction, finishes, furniture, and equipment within the project area;

b. Provide dust-partitions and temporary construction barriers separating the work area from other parts of the building;

c. Remove, set-aside, protect, and re-install architectural features as required for the installation and modification of the building structure (architectural features include, but are not limited to: ceiling-mounted fixtures, casework, signage, furniture, and equipment);

d. Demolish architectural features as required for the installation and modification of the building structure (architectural features to be demolished include: exterior stucco at location of new bond beam, ceilings in rooms receiving structural modifications, and interior walls as required to install new structural members);

e. Demolish existing non-compliant stairs as indicated on conceptual floor plan;

f. Design and construct new code compliant stairs;

g. Remove, modify, and re-install architectural features permanently affected by the installation and modification of the building structure (architectural features include, but are not limited to: ceilings, countertops, and casework);

h. Install new windows where required due to provision of supports for the structural upgrades.

i. Patch, repair, and refinish all surfaces modified or damaged during construction; and

j. Removal all construction debris and provide final clean-up of the project area.

Extensive coordination will be required between the architectural work and structural requirements of this project.

3.1.1 DESIGN

The Contractor shall provide a design and construction package that uses the space allocations, functional adjacencies, design details, and features given or referenced in this RFP. The design shall incorporate all referenced codes and regulations. Additional details shall be created by the Contractor as required, but shall conform to the requirements of this RFP and are subject to the approval of the COR. A schematic design has been attached for reference. The schematic plans are provided for diagrammatic purposes only and do not necessarily represent an approved floor plan or design. The Contractor is responsible for providing a design that meets all requirements of the User and the codes and criteria referenced in this Statement or Work.

3.1.2 DESIGN SUBMITTALS

The Contractor shall make the architectural submittals after contract award in accordance with Section 01 33 16 DESIGN AFTER AWARD and Section 01 33 00 SUBMITTAL PROCEDURES. The documents listed below shall be prepared and submitted by the Contractor.

3.1.2.1 65% DESIGN SUBMISSION

Include the following drawings and reports as applicable to the project:

a. Demolition Plans – Provide plans of existing conditions indicating areas to be demolished and areas to remain;

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b. Floor Plans – Provide all floor plans, indicating room names and basic dimensions;

c. Ceiling Plans – Provide reflected ceiling plans for all rooms, indicating ceiling materials and fixtures;

d. Building Elevations – Provide all building elevations indicating all exterior materials;

e. Stair Section – Indicate riser/tread dimensions, heights of handrails, and heights of other critical building elements;

f. Outline Specifications – Provide outline specifications for all work and materials; and

g. Design Analysis – Provide a narrative indicating how the design meets the requirements of this SOW

3.1.2.2 95% DESIGN SUBMISSION

The 95% Submittal provides a complete and final set of contract documents essentially ready for construction by the D/B Contractor. All previous government review comments must have been addressed. Include the following drawings and reports:

a. All required documents from the 65% Submission updated to incorporate all comments from the 65% Review;

b. Interior Elevations – Provide enlarged interior elevations of rooms modified in the design, indicate all materials, finishes, and coordination with structural systems;

c. Interior Details – Provide enlarged details of critical intersections with architectural features and new structural members indicating all materials;

d. Stair Details – Provide enlarged details of critical stair components including treads, risers, handrails, guardrails, and connections to existing structure;

e. Color Board – Provide a material and color board; and

f. Detailed Specifications – Provide detailed specifications with line items for all work and materials.

3.1.2.3 100% (CORRECTED FINAL) DESIGN SUBMISSION

The 100% Submittal provides a corrected final set of contract documents ready for construction by the D/B Contractor. All government review comments from all submittal phases must have been addressed and incorporated. Include all of the required drawings and documents from previous submittals.

3.2 TECHNICAL CRITERIA AND STANDARDS

Project design shall be in accordance with the requirements outlined in section 1.7.

3.2.1 LIFE SAFETY REQUIREMENTS

The Contractor shall meet all Host Nation and local Fire Suppression System codes and requirements. If Host Nation requirements do not exist, follow the International Building Code (IBC) 2015.

3.2.2 HANDICAPPED ACCESSIBILITY REQUIREMENTS

This project does not contain handicapped accessibility requirements.

3.3 GENERAL SCOPE OF WORK

The architectural elements of this facility shall be designed to withstand all site-specific environmental conditions such as wide seasonal temperature swings, local wind, rain, snow and earthquake conditions. All architectural features shall be appropriately braced for anticipated seismic activity. The Contractor shall have flexibility to propose alternate building materials to meet the facility’s requirements, but final selection of materials shall be subject to the approval of the COR. Materials and building systems shall be selected with consideration given to economics not only in the initial acquisition, but also in the future maintenance of the materials when incorporated into the work.

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3.4 DETAILED SCOPE OF WORK

The contractor is responsible for the following specific task required for the construction of this facility.

3.4.1 DEMOLITION

The Contractor is responsible for all required demolition as indicated in this scope. Demolition shall be limited to the minimum required to execute the structural modifications required by this SOW.

All demolished materials shall be abated and disposed of in accordance with local laws, codes and regulations. The contractor shall be responsible for all required testing before, during and after demolitions as well as for all required compliance with safety standards.

3.4.1.1 EXTERIOR DEMOLITION

The Contractor shall demolish and dispose of all exterior finishes where a new structural bond beam is required at the roof. Demolition shall be executed carefully to disturb the minimum amount of exterior material as possible. After the bond beam has been poured and inspected, the Contractor shall provide all new exterior finishes installed and painted to appear seamless with existing exterior surfaces.

3.4.1.2 INTERIOR DEMOLITION

The Contractor shall demolish and dispose of ceiling in rooms to receive structural modifications. For gypsum board ceilings, minimize demolition to the area where the structural member is being installed. For suspended acoustic ceilings, demolish the entirety of the ceiling; except in corridors, demolish the suspended ceiling to the nearest main “Tee”. After construction is complete, the Contractor shall provide all new ceilings installed to match existing ceilings in all rooms where ceilings were removed. The Contractor is responsible for setting aside all ceiling fixtures and accessories for reuse (including lights, mechanical grilles, fire alarm components, etc.).

The Contractor shall demolish interior walls as required to install new structural members. After construction is complete, the Contractor shall patch and repair disturbed walls. Contractor shall detail new finishes to allow for movement of new structural members without cracking or otherwise damaging wall finishes. The Contractor is responsible for setting aside all wall fixtures and accessories for reuse (including lights, casework, signs, fire alarm components, etc.).

3.4.1.3 DISTURBED FIXTURES AND FINISHES

Where finishes or fixtures are disturbed or damaged due to demolition or construction, remove the damaged fixture or finish and replace with new. New fixtures shall match the existing removed fixture. New finishes shall match the existing removed finished. All finished surfaces must be clean, continuous, and integrate seamlessly with existing undisturbed finishes.

3.4.2 BUILDING SYSTEM AND MATERIALS

The intent of this RFP is to allow the contractor the maximum flexibility to design and construct this facility in an economical manner without sacrificing good engineering practices, quality materials and systems. The Government would like low or no maintenance finish materials to the greatest extent possible.

Building materials as described herein for roofing, walls, ceilings, doors, windows and floors are minimum requirements and may require revision based on code compliance and criteria.

3.4.2.1 FIRE PROTECTION RATINGS OF INTERIOR FINISHES

All interior finishes shall conform to Host Nation fire protection standards/requirements or equivalent US standards/requirements.

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3.4.2.2 ACOUSTICAL DESIGN

New construction shall meet the minimum sound protection per Host Nation requirements and equivalent US standards/requirements.

3.4.3 EXTERIOR CONSTRUCTION WORK

3.4.3.1 EXTERIOR WALLS

The existing exterior walls of the facility shall remain and be reused. The Contractor is responsible for patching and repairing stucco where new bond beams are installed. Finished exterior surfaces shall be continuous and integrate seamlessly with existing, undisturbed exterior finishes.

3.4.3.2 EXTERIOR WINDOWS

Do not modify existing exterior windows unless required due to structural upgrades. Where windows need to replaced or reduced in size due to structural upgrades the contractor shall install new window that fit to the existing windows.

Contractor shall provide flashing, caulking, and sealing as required at existing exterior windows where new bond beams are installed.

3.4.4 INTERIOR CONSTRUCTION WORK

3.4.4.1 INTERIOR WALLS

Reconstruct interior walls as required after installation of new structural members is complete. New walls construction shall be finished to appear seamless with existing, undisturbed wall construction. The Contractor shall detail new wall construction to allow for movement of new structural members without cracking or otherwise damaging wall construction or finishes. The Contractor is responsible for setting aside, protecting, and reinstalling all existing wall fixtures and accessories (including all lights, casework, signs, fire alarm components, etc.).

3.4.4.2 INTERIOR WALL FINISHES

Provide new interior wall finishes at all locations where existing finishes have been removed or disturbed during construction. Refer to Section 3.4.1 DEMOLITION.

3.4.4.2.1 INTERIOR WALL PLASTER

Provide new coat of cement plaster on interior walls. Steel trowel to a smooth surface. Provide moisture resistant backing materials in all toilet and janitor rooms.

3.4.4.2.2 INTERIOR WALL PAINT

Paint with one coat of approved alkali resistant undercoat paint and two coats super acrylic finish. Low VOC, environmentally friendly paint must be used. Paint shall be lead free, water resistive and open to vapor diffusion. All paint shall be washable after drying. All paint colors shall be approved by COR.

3.4.4.3 CEILINGS

Provide new interior ceilings at all locations where existing ceilings have been removed or disturbed during construction. The Contractor is responsible for setting aside, protecting, and reinstalling all existing ceiling fixtures and accessories (including all lights, mechanical grilles, fire alarm components, etc.). Refer to Section 3.4.1 DEMOLITION. New ceilings shall be of same type and material as existing ceilings that they are replacing. New ceilings shall be finished to appear seamless with existing, undisturbed construction. The Contractor shall detail new ceiling construction to allow for movement of new structural members without cracking or otherwise damaging ceiling construction or finishes. New ceilings shall have the same finished height as existing ceilings.

3.4.4.3.1 GYPSUM BOARD CEILINGS

Provide new gypsum board ceilings to replace existing gypsum board ceilings removed or disturbed during construction. Provide and install all required components for a suspended gypsum board ceiling system including mounting and

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WALL PAINT.

3.4.4.3.2 ACOUSTIC SUSPENDED CEILINGS

Provide new suspended acoustic tile ceilings to replace existing suspended acoustic tile ceilings removed or disturbed during construction. Provide and install all required components for a suspended acoustic tile ceiling system including mounting and supports of light fixtures. Acoustic tile ceilings shall be professionally aligned with room geometry to provide the best blend of functionality and optical appearance. Visible grid profiles shall be matt white.

All suspended ceilings shall be installed to allow full operability of windows.

Acoustic suspended ceilings shall be moisture resistant in all toilet and janitor rooms.

3.4.4.4 FLOORS

Provide new interior floors finishes at all locations where existing finishes have been disturbed during construction. Refer to Section 3.4.1 DEMOLITION.

3.4.4.5 STAIRS

Demolish existing non-compliant stairs as indicated on conceptual floor plans.

Design and install new stairs with concrete filled steel pans. Finish stairs to match existing. Stairs must be Life Safety Code compliant, with equal riser height and tread length throughout the entire stair. Provide steel handrails and guardrails per Host Nation and local building codes.

3.4.4.6 CASEWORK

3.4.4.6.1 WALL-MOUNTED MODULAR CASEWORK

Remove, set aside, and protect any wall-mounted modular casework that inhibits installation of new structural members. Reinstall casework after construction is complete. Refer to Section 3.4.1 DEMOLITION.

3.4.4.6.2 BUILT-IN CASEWORK

Modify existing built-in casework as required to install new structural members in Data Entry room. The Contractor shall detail steel installation to minimize the extent of the modifications. Alterations may include removing portions of built-in wood cabinet, modifying existing glass doors to ensure full operability after new structural members are installed, and refinishing wood cabinet to provide a seamless appearance between altered and unmodified portions of the casework.

3.4.4.7 COUNTERTOPS

The Contractor shall detail steel installation to avoid modifying existing concrete countertops wherever practicable. Where countertops must be altered, the Contractor shall detail steel installation to minimize the extent of the modifications. Patch and repair countertops at all locations where existing countertops have been disturbed during construction. Refer to Section 3.4.1

DEMOLITION.

3.4.4.8 EXPOSED STEEL

The Contractor shall detail steel installation to conceal all new steel with furring and plasterboard wherever practicable. Exposed steel is only acceptable where it cannot be concealed due to head height or other life safety concerns.

Paint all exposed steel members. Paint system shall be one coat of rust inhibitive primer and two coats of finish paint. Finish coat paint shall be an alkyd base paint. Color shall be as approved by the COR.

3.4.5 FINAL CLEAN-UP

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Remove all temporary dust partitions and construction barriers. All surfaces of walls, doors, windows (inside and outside to include outside window sills), light fixtures, ceiling grid profiles, window sills, ventilation intakes and outlets, all wall and ceiling mounted devices and features, built-in furniture, etc. shall be cleaned in accordance with manufacturer guidelines. Clean or replace all filters in mechanical equipment serving rooms that received structural modifications. Follow the building material and cleaning agent manufacturer's instructions. All devices and tools required for the performance of the work shall be provided or delivered by the Contractor to include all necessary additional scaffolding and ladders. All protective coatings shall be removed. Liquid cleaners shall not contain any volatile organic content.

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4.0 STRUCTURAL

4.1 GENERAL

The Contractor shall provide and perform structural engineering design and construction services as required to provide a complete, accessible, functional and usable project.

The primary structural effort of this project includes

a. Verify existing conditions and dimensions for designing structural repairs.

Provide destructive and non-destructive testing as required to evaluate the current load bearing capacity and to design the structural retrofit.

Dimensions used in the concept level structural design and analysis shall be field verified. Investigate the span direction of the ceiling slabs above ground floor as a basis for the design of the structural retrofit as shown exemplified in attachment 3.

b. Evaluation of the existing emergency shoring in place in the building.

Determine if existing emergency shoring provides adequate shoring support to prevent structural failure. Notify the COR to contact USACE Europe District Structural Engineers immediately if adverse conditions are determined.

c. The design and construction of structural retrofits to reinforce the first floor concrete floor slabs as shown exemplified in Attachment 3. Retrofits shall include all necessary steel beams, columns, base plates, bearing plates, connections of steel members, and foundations to achieve a safe end state for a complete and useable facility.

The design shall include a construction features that are required to provide vertical support for the new steel structure to include upgraded masonry walls, new steel columns including foundations, (partially) blocked up windows, replacement of door or window lintels.

d. Specifying procedures and repairing cracks in the floor slabs by exposing the cracks and injecting an approved epoxy adhesive.

e. Replacement of the failed bond beam and top course of masonry at the exterior wall in the Clinical Research Room and Common Room on the first floor above ground. Prepare a shoring plan to support the roof structure during the repairs. Pour a new bond beam and provide steel ties which fasten the bond beam to the tops of the masonry walls and the roof structure to provide adequate lateral resistance and resist roof uplift from wind.

f. The design and construction of two columns to support areas of the first floor atrium corridor which are currently unsupported as shown on Attachment 3.

g. Demolishing and rebuilding the exterior stairs between the ground floor and first floor above ground. The new stair shall have handrails on both sides and be designed with an even riser height to meet egress requirements of current building codes and standards.

h. Other elements shall include but are not limited to lateral load stability and diaphragm design, framing and connection of any architectural features, and support of mechanical and electrical equipment.

The contractor shall have as part of his design team a licensed or approved structural engineer, unless otherwise approved by the COR. The structural engineer’s licensure and qualifications shall be submitted to the COR. The Contractor’s structural engineer shall be responsible for the design of any part of the building structural systems.

The structural design of the foundation, superstructure and any other structural aspects shall be in accordance with the design criteria within this RFP. This is in addition to any host nation requirements for structural engineering oversight.

The superstructure of the project building and the foundation shall be constructed from locally available materials. The construction shall provide a minimum service life of 25 years.

4.2 APPLICABLE DESIGN CRITERIA

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All Design, Safety in Construction, Materials, and Performance of Construction Services shall be in accordance with current Kenyan codes and standards and the US 2015 International Building Code. In case of conflicting requirements between the various elements, the more stringent criteria shall govern.

Any material or construction that does not meet the requirements of this RFP or does not meet the applicable codes and standards shall be removed and replaced at the Contractor’s expense.

Structural design methods and allowable stresses or load factors for the various structural materials shall be in accordance with paragraph 1.7.

4.3 SUBMITTALS

4.3.1 DESIGN SUBMITTALS

The contractor shall provide the structural submittals after contract award in accordance with Section 01 33 00 SUBMITTAL PROCEDURES. In addition to General Section 1.4 Submittals of this document the following documents shall be submitted:

4.3.1.1 DRAWINGS

The following structural detail drawings shall be provided by the Contractor as required, but shall conform to the requirements of this SOW and are subject to the approval of the Contracting Officer Representative (COR). Construction drawings shall include:

65% Design Submittal

a. Preliminary floor plans which provide information of the remediations to the structural system giving general information about dimensions of main elements such as columns, beams, bearing walls, etc. (min. scale 1:50)

b. Preliminary foundation plans showing dimensions, arrangements, locations referred to a column line grid system, type of foundation and foundation obstructions. Include the layout of all slabs, footings, piers, grade beams, piles, etc., showing all foundation features of the design. (min. scale 1:50)

c. Details of connections for primary steel framing members (min. scale 1:10)

95% Design Submittal

a. All items from the 65% Design Submittal requirements

b. All necessary sections and details of the load bearing structure (min. scale

1:20)

c. Detailed specifications that are typically sent to sub-contractors.

100% Submittal

a. The 100% Submittal provides a complete and final set of contract documents ready for construction. All previous government review comments must have been addressed. Include all updated drawings, specifications and calculations from the 95% Submittal.

b. The design criteria actually used for the structural design shall be included in the structural notes on the drawings.

As Built Drawing Submittal

a. The As-built Submittal provides a complete and final set of record drawings documenting site conditions based on a survey of the final construction performed by the Contractor.

CAD files of all construction drawings and as-built drawings shall be submitted in .dwg (latest AutoCAD version) and in .pdf format.

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The design documents actually used for the structural design shall be included in the structural notes on the drawings.

4.3.1.2 STRUCTURAL CALCULATIONS & DESIGN ANALYSIS

The contractor shall submit the structural calculations of all load bearing structural elements and their connections related to this RFP. The design analysis shall state and list the basis of design for all project aspects and features. The design analysis and calculations shall be in accordance with the enclosed NAU Engineering Guideline 01/2016 Preparation of Structural Calculations. The current local or national Host Nation codes and standards on which the structural calculation are based shall be referenced in the calculations. If applicable, an electronic copy of the applicable local or national Host Nation codes shall be provided. Structural calculations shall be sequentially numbered for ease of referencing for all submittal stages.

4.4 PROOFING OF STRUCTURAL DESIGN

The Contractor shall have an equally qualified engineer other than the designer perform an independent review of all specifications, drawings, design analysis, calculations, and other required data prior to submission to the Government.

Submit a letter of certification from the structural engineer performing the independent review stating that they “have checked the structural design calculations, analysis, and drawings and certify that these comply with the applicable building code requirements and standards.”

4.5 STRUCTURAL DESIGN CRITERIA

Structural design methods and allowable stresses or load factors for the various structural materials shall be in accordance with the Applicable Design Criteria paragraph 4.2. Recommendations made in the codes, specifications and industry standards are requirements of this document, unless specified otherwise. The references used for the project design and contract documents shall be included in the design analysis required for this project.

4.5.1 MINIMUM STRUCTURAL DESIGN LOADS

The design loads shall be determined in accordance with the codes and standards listed in the Applicable Design Criteria paragraph 4.2. The design load criteria specified herein are minimums; the Contractor is responsible for verifying the actual design loads for this site. The Contractor should determine if special loadings must be considered and notify the COR. Any cost and/or schedule impact due to the Contractor’s failure to notify the COR of these requirements specified herein four weeks before the submittal is due shall be to the Contractor’s account. Design loads and criteria shall be included in the structural notes on the drawings. The minimum design load criteria for this project as follows:

4.5.1.1 DEAD LOADS

The structural system shall be designed and constructed to safely support all dead loads, permanent or temporary, including but not limited to self-weight, partitions, insulation, ceiling, floor covering, and all equipment that is fixed in position. Loads from architectural/mechanical/electrical equipment shall be coordinated with the appropriate discipline. All loads and load case combinations shall be in accordance with the codes and standards listed in the Applicable Design Criteria paragraph 4.2. Load factors for designs shall be based on the applicable material design standard.

4.5.1.2 LIVE LOADS

4.5.1.2.1 FLOOR LIVE LOADS

Floor live loads shall be in accordance with the codes and standards listed in the Applicable Design Criteria paragraph 4.2 for the anticipated usage to include filing/storage areas within the second floor area.

4.5.1.2.2 ROOF LOADS

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Roofs shall be designed to support live loads and wind loads including components and cladding in accordance with the Applicable Design Criteria paragraph 4.2.

4.5.1.2.3 HORIZONTAL LOADS

The structural system wind design, including components and cladding, and the seismic design shall be in accordance with the codes and standards listed in the Applicable Design Criteria paragraph 4.2. If IBC 2015 and ASCE 7-10 are employed for the wind design, the minimum design wind speed shall be 177 km/h (110 mph). If IBC 2015 and ASCE 7-10 are employed for the seismic design, a Site Class D and seismic spectral accelerations Ss = 7%g and S1 = 3%g shall be used as minimums unless higher values should be used based on local requirements.

4.6 MATERIALS

The use of the recommended materials and/or alternative materials shall be in conformance with the publications listed in the Applicable Design Criteria paragraph 4.2. Any exceptions shall be noted. Alternative materials may be submitted to the COR for approval if the Contractor determines the materials are more economically viable for this geographic region. Any material or construction that does not meet the requirements of this SOW or does not meet the applicable codes and standards shall be removed and replaced at the Contractor’s expense.

4.6.1 REINFORCED CONCRETE

All concrete shall be at least equivalent C 20/25 and reinforcing steel shall be equivalent Grade B500A conforming to the applicable Eurocode standard.

4.6.1.1 CONCRETE MIXTURE PROPORTIONS

Concrete mixture proportions shall be the responsibility of the Contractor.

Mixture proportions shall include the dry weights of cementitious material(s); the nominal maximum size of the coarse aggregate; the specific gravities, absorptions, and saturated surface-dry weights of fine and coarse aggregates; the quantities, types, and names of admixtures; and quantity of water per cubic meter concrete.

All materials included in the mixture proportions shall be of the same type and from the same source as will be used on the project.

4.6.2 FORMS

Materials for forms shall be plywood, metal, metal-framed, reinforced fiberglass, or plywood-faced to provide continuous, straight, smooth, exposed surfaces.

4.6.3 MASONRY

Clay bricks, solid bricks, perforated bricks or any other masonry materials used in the project shall conform to the appropriate Local or Host Nation Standard.

4.6.4 STRUCTURAL STEEL

Structural steel shall be of a minimum steel grade equivalent S 235 conforming to the applicable Eurocode standard.

4.6.5 HOLLOW STEEL SECTIONS

Hollow steel sections shall be of a minimum steel grade equivalent S 235 conforming to the applicable Eurocode standard.

4.6.6 WELDING

Welding shall be performed in accordance with the Applicable Design Criteria paragraph 4.2. Field welding shall not be performed without approval of the COR and USACE Europe District Technical Engineering Section Structural Engineer.

4.7 BUILDING STRUCTURAL SYSTEMS

4.7.1 FOUNDATION SYSTEMS

Foundations shall be permanent reinforced concrete foundations in accordance with the structural calculations. Foundations shall be appropriately sized for anticipated loading, both live and dead. If foundations are near or below the

09-JUL-18 Page 18 of 19 water table, appropriate water proofing measures shall be implemented into foundation design, e.g. waterproof membranes, coatings, drains, etc. Water and storm drainage piping is prohibited under building foundations without special provisions and approval by the COR.

4.7.1.1 SLABS-ON-GROUND

Floor slabs-on-ground shall be a minimum of 15 cm thick. Floor slabs-on-ground shall be reinforced with either bar or mat reinforcing having a minimum area of reinforcing of 0.2% of the slab cross sectional area and located 4 cm clear from the top surface of the slab. Fiber mesh reinforcing in the slab concrete will not be allowed.

4.7.1.2 CAPILLARY WATER BARRIER

A 15 cm thick capillary water barrier shall be provided under all new interior slabs-on-ground. Recycled crushed material from demolition of pavements shall not be used as granular fill below building slabs-on-ground.

4.7.1.3 VAPOR BARRIER

If used, vapor barrier shall be polyethylene sheeting with a minimum thickness of 15 mils. The vapor barrier shall comply with Class B, five ply, nylon, or polyester cord reinforced high density polyethylene sheets. Place 8 cm of compacted granular sand material between the underside of the slab and the vapor barrier. The use of a vapor barrier under new slabs-on-ground is discouraged except under sensitive floor finishes within the building where its use is required by the flooring finish material manufacturer. Tile, and PVC flooring are not normally considered sensitive floor finishes such that they require a vapor barrier under the slabs-on-ground.

4.7.1.4 ALLOWABLE SOIL BEARING PRESSURE

The allowable soil bearing pressure used for foundation design shall be based on a geotechnical investigation. Reference the Civil Design section of this document for geotechnical investigation requirements. In the absence of a soils investigation, foundations for single story structures may be designed using allowable bearing pressures of 1500 psi (72 kN/m2) provided that no unsuitable soils, such as such as muck or expansive clays, are discovered during excavation of the foundations. If unsuitable soils are discovered, the structural engineer shall be notified to direct corrective measures as required.

4.7.1.5 MINIMUM EXCAVATION AND GRADING REQUIREMENTS

Minimum excavation and grading requirements shall be in conformance with the requirements in the Applicable Design Criteria paragraph 4.2.

4.8 SUPERSTRUCTURE SYSTEMS

4.8.1 LATERAL (HORIZONTAL) FORCE RESISTING SYSTEM

Rehabilitation, repair, replacement, or new elements comprising the lateral force resisting system in the buildings shall be compatible with the existing structural elements. The structural design of the structural repairs shall consider lateral forces acting on the structure.

4.8.2 STRUCTURAL REPAIRS TO SUPPORT SLABS

New steel structural retrofit elements shall be designed and installed to reinforce the first floor concrete floor slabs. Based on material testing the slabs are assumed to have an average strength of approximately 855 psi. Steel reinforcement strength is unknown and shall be assumed to be lower than code requirements.