Amend_0002_Attch_12_Special_Specifications_-_Project_13580-Revision_01.pdf

13580 1 Construction Documents

Project 13580

Special Specifications

Revision 01 May 2016

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Table of Contents

- Special Specification -

CHAPTER 01: EARTHWORKS

CHAPTER 02: CAST-IN-PLACE CONCRETE WORKS

CHAPTER 04: MASONRY WORKS

CHAPTER 05: SEALING WORKS

CHAPTER 06: JOINERY AND STEEL METAL WORKS PRODUCTS

CHAPTER 07: PLUMBING WORKS

CHAPTER 08: ELECTRICAL INSTALLATIONS

CHAPTER 09: PLASTERING WORKS

CHAPTER 10: FLOORING AND CLADDING WORKS

CHAPTER 11: PAINTING WORKS

CHAPTER 12: ALUMINUM WORKS

CHAPTER 15: HVAC WORKS

CHAPTER 19: STRUCTURAL STEEL

CHAPTER 22: INDUSTRIALIZED BUILDING ELEMENTS

CHAPTER 24: DEMOLITION AND DISMANTLE WORK

CHAPTER 29: SIGNAGE AND UTILITIES

CHAPTER 30: FIXED FURNITURE AND CUPBOARD

CHAPTER 34-1: FIRE DETECTION AND EXTINGUISHING SYSTEMS

CHAPTER 44: SECURITY FENCES, GATES AND BARRIERS

CHAPTER 51 : CONSTRUCTION OF ROADS LOTS AND RUNWAYS

CHAPTER 57: WATER AND SEWAGE SYSTEMS

ATTACHMENT A: SOIL REPORT

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Chapter 01: Earthworks

01.01 General

All work shall be performed in accordance with Chapter 01 of the General Technical Specification, (HNTR) unless otherwise specified in this Special Specification.

01.02 Additional Instructions

The work shall be done according to these additional instructions:

a) Earthworks for beams shall be done by hand and/or with the appropriate equipment for all depth and width.

b) All the Earthworks performed by using mechanical equipment shall be performed until a level of 20 cm above the base level, and shall include final corrections of the digging to the level and/ required slope by digging by hand and tightening the foundations as described in the following before putting the filling or pouring concrete. Before starting the excavations for base foundations or floors in areas where there exist a layer of waste, this waste shall be firstly removed in order to prevent its mixing with the local soil. Shall this mixing happens, the excavated material shall be disqualified for refilling.

c) In case of over digging, it shall be the role of the contractor to perform the flattening and tightening of the foundation by controlled refilling until the designed level. In case of shallow foundations, there shall be a refilling with thin concrete up to the level required by design for over digging due to the contractor mistake.

d) The contractor shall protect the digging from upper water penetration and flowing. The contractor shall be allowed to obstruct the water penetration in any way he wants, with the approval of the supervisor, provided that the digging shall remain protected and dry.

e) All the earthworks performed on all types of soil, shall include the disposal of the material dug outside of the site area to places approved by the authorities.

End of Chapter 01 Special Specification

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Chapter 02: Cast-in-place Concrete Works

02.01 General

02.01.01 All work shall be performed in accordance with Chapter 02 of the General

Technical Specification, (HNTR) unless otherwise specified in this Special Specification.

02.01.02 Additional Standards

In addition to Chapter 02 paragraph 02.02.01 of the HNTR add the following to the list of standards applying to this chapter:

SII. 940 - Foundations for buildings;

SII. 412 - Characteristic loads;

SII. 413 - Earthquake resistance of structure;

SII. 414 - Wind load;

SII 466 - Concrete design;

SII 739 - Steel for the reinforcement of concrete;

SII 1142 - Guard stand handrail;

SII 1378 - Pile foundations in rock by percussion drilling.

02.02 Submittals for Architectural Cast-In-Situ Concrete

02.02.01 The Contractor shall submit shop drawings required for cast-in-situ concrete according to S.I. 1226, part 1. The Contractor shall show the design, materials proposed for use, location of formed joints, location of construction joints and location of form ties.

02.03 General Directives

a) Type of concrete:

B-15: Leveling layer, Protection Layer B-30 or B-50: – according to structural drawings. Maximum water/cement ratio of 0.45.

b) Casting stoppage shall be carried out according to a detailed plan proposed by the Contractor and submitted the Contracting Officer or their representative not later than 30 days prior to the said casting execution.

c) No holes or passages shall be included in the concrete of structural elements, except those indicated in the structural workshop drawings. All requests for making openings of any kind, shall be submitted to the COR.

d) The Building's structure shall be designed for continuous erection, therefore each element shall be executed in due time. No execution of any element shall by postponed to a later date, without the specific and written authorization of the Contracting Officer or their representative.

e) As a rule, no casting interruption shall be allowed if not coordinated beforehand with the Structural Design. The casting interruption shall be in straight lines. In places as indicated by the Architect, casting interruptions shall be performed with the aid of 2 x 2 cm triangular wedges installed in the form work.

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Besides what is indicated in the General Specifications, the reinforcement shall be thoroughly cleaned at the casting interruptions until the steel is totally clean and without any remains of concrete or liquid cement.

f) As a rule, the reinforcement shall bear no sign of rust and be clean of any dirt.

02.03.01 Parapets and Risers

The casting of parapets and risers shall include recesses for anchoring the waterproofing layers, 2.5 cm deep and at a bright of 30 cm, unless otherwise indicated in the relevant detail.

02.04 Concrete

02.04.01 Concrete Works

a) All works shall be also according to S.I: 118, S.I. 466, and S.I. 601.

Concrete works of all types include form works of any shape required by the drawings, including protuberances, recesses, grooves, openings, and truncations to be executed in an accurate manner and form, sleeves, anchors and fixings for fittings.

b) The concrete shall always be ordered specifically for its purpose. The color of the concrete shall be uniform as per the requirements of the contract documents. The type of concrete for the concrete casting shall be ready mixed concrete adapted to the use of a concrete pump.

c) The maximal size of the aggregates shall be no more than 5 mm.

d) Super-plasticizer and air-trapping and shrinkage-proof additives shall be used. The Contractor shall order all the concrete from the same plant and use a uniform mix so as to obtain a uniform color of the concrete. Exposed concrete having any defect and not approved by the Contracting Officer or their representative shall be immediately removed by the Contractor.

e) The casting of the concrete shall be accompanied by a vibrator. Several vibrators shall be on the site with various needle diameters, including enough spares. Similarly, the form work shall be struck by rubber hammers all along the pumping operations, to ensure full penetration of the concrete into the form work.

f) The height of pouring the concrete shall not exceed 2 m above the hitting point of the concrete. In the case of the casting of walls, a concrete pump tube or thermal pipe shall be inserted into the form work down to the level mentioned above.

g) The cast concrete shall be cured according to the requirements of the General Specifications (HNTR) by watering the cast concrete or laying a wet cloth on top of it, or by any other curing method found to be suitable.

02.04.02 Concrete in "Arranged" Form work

a) All works shall be also according to S.I 904 - Form works for Concrete.

Walls and plain surfaces where the concrete shall not be covered at a later stage, shall be executed in "arranged" steel or 20 mm thick plywood form work. The smoothness of the form works shall be inspected and it shall be made sure that they are straight, clean and greased before casting; the installation of the form work shall be continuous and level.

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b) Similarly, the closure and full water tightness between the form work and the background- cast floor or ceiling shall be ensured. The form work shall fit the slopes, the corners, etc. - so that continuous and smooth walls are obtained, with uniform background.

02.04.03 Elements with Exposed Concrete Faces

Various concrete elements in the building, such as beams in the facades and walls, etc., shall be left with no additional finish and shall have exposed surfaces, in accordance with the drawings.

02.04.04 Form work for Exposed Concrete

Since the COR intends to execute sections of the building with exposed concrete finish and/or with a certain finish, the form work for exposed concrete shall be made according to the following requirements:

a) The concrete form work shall comprise new metal forms or wooden panels having a uniform thickness, with a Formica lining and modular dimensions.

b) In no case shall damage or defective wood be used.

c) Casting holes shall be made on the side hidden from view.

d) Tying of the forms with steel wires shall not be permitted. The forms shall be tied with plastic tubing approved by the COR and not with wires. The above also includes removal of the plastic tubing and filling of the holes with mortar cement. All the tubes shall be of uniform height and shall be at fixed distances, in accordance with the Contractor’s Design Documents to be submitted before execution of the forms. In the case of wooden forms, the joints between the panels shall be filled with silicone.

e) The reinforcing rods shall rest on supports of pre-cast concrete or a suitable plastic material, and shall not be supported by means of metal parts touching the forms. In addition, no nails, wires or other means of connection shall be inserted in the forms for the purpose of securing the reinforcing rods.

f) Accessories for reinforced concrete elements shall be fixed cleanly, neatly and consistently.

g) Concrete spills shall be dealt with immediately after dismantling of the forms but not before the inspection by the Contractor’s Responsible Structural Engineer.

02.04.05 Repair of Damaged Concrete

a) Shall defects be uncovered in the concrete after its casting, those parts of the concrete found unsuited to the Specifications, as well as damaged concrete, shall be removed from the site and in these same places, totally new elements shall be cast by the Contractor.

b) Depressions and aggregate pockets, or any other defect uncovered on the concrete surface, shall be filled by the Contractor with concrete or cement mortar (1:3). Likewise, protuberances or recesses, etc., shall be chiseled by the Contractor. The Contractor shall perform a sample of the remedy to be approved by the Contracting Officer or their representative.

c) In those places where the quality of the concrete finish is defective, the Contractor shall carry out the repairs in the Buildings with enriched concrete.

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02.04.06 Finish of the Concrete

a) All concrete finishes shall be as described in the drawings.

b) Exposed concrete having different colors, with defects of any kind, shall be immediately demolished by the Contractor.

02.04.07 Finish of the Chiseled Concrete

Finish of the concrete in Facades of the Buildings at the Center of the Base. The lightly chiseled finish of the concrete shall be subject to the following requirements:

a) The chiseling shall be carried out manually.

b) The rebars cover shall be not less than 2.5 cm, after the chiseling. c) The depth of the chiseling shall be not more than 0.5 cm.

c) The spacers ensuring the reinforcement cover shall be of concrete, as indicated in the Exposed Concrete Sub-Chapter (02.05.04) or alternatively, of any other material approved by the Contracting Officer or their representative.

d) The strength of the ready-mix concrete, after the addition of pigments and additives shall reach at least the B-30 strength, unless otherwise required in the Drawings and the Specifications. Similarly, the removal of the supports and scaffoldings of the cast element shall be carried out according to the Contractor’s design documents.

02.05 Slabs

In the concrete slabs drawings, all types of slabs shall be included, horizontal and sloping, including those of the stairs.

02.06 Floors and Walls

The Contractor shall make sure that the various elements fixed unto the concrete, such as electrical fittings and various pipes, are set prior to the casting, at their appropriate place, according to the Contractor’s design documents.

02.07 Casting

The Structural Engineer shall be advised at least 48 hours ahead of the intention of casting concrete, in order to enable him to authorize the casting.

02.08 Special Requirements for the Accuracy of the Casting

a) The Contractor shall take into consideration that fact that maximum accuracy is expected in the execution of casting. The Contractor shall check the dimensions and the leveling required during the installation of the form works, using precise measuring equipment (theodolite, etc,), by a qualified Engineering Surveyor.

b) The tolerance, which is the difference between the nominal and the factual one, shall not exceed Degree 6 as per the degrees of SII No. 789 (Table No.1).

c) Shall the above detailed requirements not be met, this shall cause the rejection of the concrete elements, as detailed in paragraph 02.095of the General Specifications, these requirements are also valid with respect to normal concrete (not exposed).

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02.09 Reinforcement Spacing

a) The distance between the reinforcement and the exposed concrete surface shall not be less than 2 cm, unless otherwise specified in the structural detail. In order to ensure this, the Contractor shall install spacers or manufactured in-situ concrete spacers (of concrete similar to that to be cast), cast in plastic egg-shaped molds with tie-wires or he shall use PVC standard spacers approved by the Contracting Officer or their representative.

b) The Contractor shall check the steel arrangement according to the sections and details appearing in the Contractor’s design drawings, for the easy passage of the concrete between the bars, including the case of the anchoring of the elements of all types set into the concrete.

c) It shall be noted that in case installation pipes (including electrical) are not set into the concrete, they shall not be grouped but be dispersed at intervals of at least 3 times the diameter of the largest pipe, so as to prevent damage to the cast element.

02.10 Passages, Sleeves, Holes, Grooves, Anchors, etc.

a) Prior to the concrete casting, the Contractor shall make sure that all the passages, sleeves, anchors, grooves, etc., needed for the execution of frames and passages for various pipes have been properly executed, and shall also make sure that the drawings in his possession are coordinated with those of the various installations and other elements; he shall advise the Contracting Officer or their representative of any mistakes or discrepancies uncovered.

b) The Contractor shall be responsible for the coordination of the exact location and dimensions of each passage, groove, anchor in the concrete, according to the drawings of all the installations executed by Sub- Contractors.

c) No breaking of the concrete shall be allowed for the installation of the above mentioned passages and anchors, unless approved by the Contracting Officer or their representative and executed according to a method determined for their execution.

02.11 Strength Testing

a) The Contractor shall order laboratory tests to determine the quality of the concrete in the various elements before the execution of elements resting on them, for all the cast elements of any type of concrete whatsoever.

b) The results of the tests carried out 7 days after the casting shall be immediately submitted to the Contracting Officer or their representative for his examination.

Samples shall be taken in such a quantity as required by the relevant Israeli Standards:

S.I. 26 - Methods of testing concrete.

S. I. 1239 - Sampling of cast in situ concrete.

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02.12 Lean Concrete

A 5 cm thick sub-base of lean concrete of B-15 type shall be executed. The concrete shall be cast on top of the layer-compacted sub-grade. under the base beams and running foundations shall there be any, as indicated in the Drawings.

02.13 Supports and Scaffolding

a) No scaffolding shall be removed or loosened without the approval of the COR.

b) Under each main beam and under walls/beams which are in fact the Building's facade, scaffolding for casting only through steel and towers manufactured by a certificated company shall be installed, according to the calculations and directives of the Manufacturer. All according to S.I. 1139 - Scaffolding.

c) The above mentioned towers shall be in sufficient numbers and of the required length in order to ensure their stability and support during the building works and during the casting of the elements until its end.

02.14 Reinforcement of the Concrete

a) The Contractor shall submit samples of the reinforcement types for testing by the Institute of Standards before their use.

b) The overlapping of the steel shall be 60 times the diameter of the bar, unless otherwise indicated.

c) The installation of the reinforcement in the beams and columns of the building shall be done in such a way as to allow the easy passage of the poured concrete.

02.15 Installation of Elements in the Concrete

Elements to be installed in the concrete shall be set accurately prior to casting, and according to the directives of the coordinated Contractor's design drawings, including structural drawings as well as sanitary, electrical, and air-conditioning installations, fittings, etc. Similarly, for the anchoring plates required for the attachment of the various elements such as: columns, balusters, stairs, etc.

End of Chapter 02 Special Specification

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Chapter 04: Masonry Works

04.01 General

a) Section 04 of the Host Nation Technical Requirements (HNTR) shall be read with this Special Specification which constitutes the extent of the Work with regard to Masonry Works. In case of conflict these special specifications shall prevail over the HNTR.

b) Only blocks produced under the supervision of the Standard Institute with a “Standard Mark” shall be approved. The blocks shall be hollow concrete blocks with 4 holes.

04.02 Additional Standards

In addition to Chapter 04 of the HNTR add the following to the list of Standards applying to this Chapter:

Israeli Standards (SI) SI 5 - Concrete Blocks for Walls SI 1045, Part 3 - Thermal Isolation for Offices

04.03 Materials

a) Type CMU-10: concrete hollow blocks 10/20/40 cm, according to SII 5 Strength: 30 kg/sq.cm Aggregate: regular Avities (holes): three (3).

b) Type CMU-20: concrete hollow blocks 20/20/40 cm, according to SII 5 Strength: 30 kg/sq.cm Aggregate: regular Avities (holes): four (4).

04.04 Construction Methods

a) At the beginning of construction lay the first row in place in every area, check the conformance of the building to the drawing, and if any non-conformance is discovered do not continue and report the situation to the Contracting Officer or their representative for further direction.

b) Together with laying the first row, also put door frames in place, which are well strengthened (unless the contractor chooses to stabilize the door frames separately.

c) Do not raise corners to a height greater than 1 meter.

04.05 Concrete Belts

a) Constructed walls shall be reinforced by casting a concrete belt, at difference in height of 2.50 m, but in any case above the door frames

b) The width of the belt shall fit the width of the wall (and shall not protrude from it). The height shall fit the calculation of full rows up to the ceiling, but in any case not less than 20 cm.

c) c) The belt shall be of concrete B-30. The iron reinforcement a diameter of 8 x 4 mm with belts of 6 mm at distances of 20 cm

d) ) In walls higher than 3.50 m the concrete belts shall be along the whole length of the partition, not only above the openings.

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04.06 Connections with Concrete Elements

a) The connection between a constructed wall and concrete elements, shall be by concrete belts with dowels sticking out of the concrete surface. The dowels are of 6 mm diameter and at distances of 20 cm.

b) The contractor shall prepare the above dowels during casting of concrete elements.

04.07 Construction

a) It is forbidden to use broken blocks.

b) It is forbidden to use blocks that lay dawn.

End of Chapter 04 Special Specification

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Chapter 05: Sealing Works

05.01 General

Chapter 05 of the HNTR shall be read in conjunction with this Special Specification which constitutes an extent to the work with regard to Waterproofing Works.

05.02 Additional Standards

In addition to Chapter 05, paragraph 05002 of HNTR add the following to the list of standards applying to this Chapter:

05.02.01 Israeli Standards (SI)

1) SI 1430, Part 3: Roofs waterproofing sheets: Polyester reinforcement fibers polymers improved bitumen or unwove fibers polymers improved bitumen sheets installed by welding.

2) SI 1536: Materials for making tight joints and cracks in buildings. c. SII 1731, Part 1: Texture coating material based on synthetic emulsion, for application on external walls.

3) SI 1229, Part 1: Rigid foamed plastic for thermal insulation: Part 1 – Boards.

4) SI 1752, Part 1: Concrete flat roofs waterproofing: Preparation of roofs sub-base for waterproofing.

5) SI 1476, Part 1: Inspection of watertightness of the building's envelope – Roofs and balconies.

6) SI 1463, Part 1: Geotextile materials: definitions, marking and identification.

05.02.02 Israeli Standard Institute Documents (SII)

1) SII 390, Part 1: Liquids and pastes for the waterproofing of buried structures: material not absorbed.

05.02.03 Foreign Standards

1) ASTM D 41-85: ASTM Primer used in roofing dampproofing and waterproofing.

2) ASTM D 2824-85: Aluminum- pigmented asphalt roof coating.

05.03 Submittals for Waterproofing Works

05.03.01 Shop Drawings

Not apply.

05.03.02 Samples:

Samples shall be submitted consisting of actual units or section of units and other finish characteristics available for each item. Submit samples of each of the following items:

1) Each type of waterproofing item that is on the list of material (B, I), size: 20 x 20 cm.

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05.03.03 Mock-Ups:

Following approval of sample, The Contractor shall construct visual mock-ups as follows:

1) The Contractor shall construct mock-ups, erected at the Project site in a location determine by the Contracting Officer or their representative that is 1 m by 1 m (showing all details and components). Assemble this mock-up to simulate final conditions and all other features of the final work.

2) Make any changes necessary to Contracting Officer or their representative’s approval of mock-up. Following approval, the mock-up shall establish the aesthetic standard of quality for the Project.

3) Approval of mock-up does not constitute approval of deviations from Contract Documents contained in mock-up, unless such deviations are specifically approved by Contracting Officer or their representative in writing.

4) When directed by the Contracting Officer or their representative, the Contractor shall demolish and remove mock-up from Project site.

5) Single-Source Manufacturing and Installation Responsibility: Engage certificated Manufacturer to assume undivided responsibility for each item specified herein, including fabrication, finishing and installation.

05.04 Scope of Work

a) This section deals with the guidelines for the waterproofing insulation of flat roofs in various buildings, the waterproofing of a covered passage, the waterproofing of floors and walls of various underground elements, the waterproofing of horizontal and vertical expansion joints as well a the waterproofing of "wet rooms" (lavatories and showers).

b) The work with the sealing materials shall be performed according to the Manufacturer's instructions.

05.05 Waterproofing Materials

05.05.01 Materials

CF-2 Cemented mortar layer protecting the waterproofing system, varying thickness but at least 4 cm.

CF-3 Slope formation with lightweight concrete (Bet Kal) weighing 1200 kg/cu.m and a minimum pressure resistance of 4 MPs, according to requirements of SII 1513.

CF-4 Concrete angle seal, raised border strip triangular 5 x 5 cm (at least) including bonding admixture and made with acrylic-cement mortar with the following composition:

50 kg of cement 120 kg of sand 10 kg of acrylic adjunctive (about 20% of the cement weight) water as required

B-1 Bitumen sheet APP polymer improved, 4 mm thick, according to requirements of SII 1430.

B-2 As B-1 but with whitened sunk white aggregate, according to requirements of SII 1430, Part 3.

B-3 Bitumen primer, according to requirements of ASTM D 41.

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B-4 Elastomeric bitumen mastic, according to requirements of ASTM D 41.

B-5 As B-1 but 5 mm thick, according to requirements of SII 1430, Part 3.

B-6 Vapor barrier: 25 micron aluminum foil.

B-7 Geotechnical polyester sheet 400 g/sq.m, according to requirements of

SII 1463. Part 1.

B-8 Elastomeric bitumen layer.

B-9 Blown bitumen, 75/25 or 85/40, according to requirements of SII 80. B-

10 Bitumen soaked glass felt sheet, according to requirements of SII 80.

I-2 Foamed polystyrene board, 2 cm thick, according to requirements of SII

1229, Part 1.

I-3 Foamed polystyrene board, 2.5 cm thick, according to requirements of

SII 1229, Part 1.

I-4 Foamed polystyrene board, 4 cm thick, according to requirements of SII

1229, Part 1.

S-6 Single component polyeuretheane elastomeric waterproofing, according to requirements of SII 1536, type F-25HM or equivalent.

S-8 Sealing of miter cut coping stones shall be sealed against penetration of moisture with highly notch-resistant special sealant, which is"guaranteed" not to cause staining around the edges of the joint on marble, granite, sandstone and all other forms of natural stone, contains fungicide and UV resistant such as Novasil-70 of the OTTO CHEMIE Company/

05.06 Guidelines for the Waterproofing and Thermal Insulation of Flat Roofs in

Various Buildings

05.06.01 Generalities

The guidelines for the execution of waterproofing and thermal insulation works in flat roofs.

The waterproofing/ thermal insulation of the above roofs shall include the following elements:

a) Preparation of the surface for its waterproofing, as per the guidelines of Part

1 of the Israeli Standards No. 1752; the cleaning of the substructure, the sealing of cracks, the sealing of holes and the smoothing of high spots in the concrete.

b) Bonding vapor barrier reinforced with glass/ aluminum foil (B-6) felt set on the concrete, by the heated method, using 72/25 blown bitumen (B-9).

c) Bonding foamed polystyrene (I-4) boards, standing up to all the requirements of Israeli Standard No. 1229, Part 1,set on top of vapor barrier membranes, by the heated method, using 75/25 blown bitumen (B-9).

d) Forming slopes with lightweight concrete ("Betkal") (CF-3) poured on top of the foamed polystyrene boards, at the minimal slope of 1.5%, in the direction of the drainage outlets in the roofs.

e) Making fair the polymeric-cementic 5 x 5 concrete seals (CF-4) at the intersection of the horizontal sub-base with the vertical parapets.

f) The spreading of a bitumen primer (B-3) standing up to the requirements of the ASTM D 41 Standard on top of the lightweight concrete sub-base and on

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g) The waterproofing of the horizontal sub-base with a two layer system of bitumen membranes (B-1), APP polymer improved and reinforced with polyester felt weighing 250 gr/sq.m, 4 mm thick each and standing up to the requirements of Israeli Standards No. 1430, Part 3, at level M. The bitumen membranes of the lower layer shall have a surface finish made of light material (sand) and they shall be welded to the horizontal sub-base which shall be covered with the bitumen primer; overlapping of membranes shall be 10 cm. The bitumen membranes of the upper layer shall have a surface finish made of white aggregate (B-2) and they shall be welded to the first layer membrane in such a way that the overlapping of the upper layer sheets with respect to the lower sheets is equivalent to 1/3 of its width.

h) The waterproofing of the intersection of the horizontal sub-base with the vertical parapets shall be achieved by 3 layers of reinforcement/ covering membranes. These sheets shall be similar to the 4 mm thick sub-base waterproofing membranes (B-1) with the fine sand surface finish. The width of the reinforcement membrane shall be such that at least 10 cm of the membrane shall be welded to the horizontal structure on both sides of the rounded-off seal. The upper cover membranes shall be similar to the sub-base waterproofing membrane, 4 mm thick, with the white aggregate surface finish (B-2). The membranes shall be welded with 10 cm overlaps between bordering membranes. The upper layer cover membranes shall reach the lower edge of the water drop and shall be fixed unto the sub-base with an aluminum section and sealing putty standing up to the requirements of Israeli Standards No.1536, type F-25HM.

i) The rendering with cement mortar including acrylic admixtures (PL-1), of the parapet surfaces above the bitumen membranes, the spreading of elastic acrylic waterproofing material standing up to the requirements of Israeli Standards No. 1731 over the rendered surfaces, in two layers at a total rate of 2 kg/sq.m.

j) The installation of the water collectors with a horizontal outlet through the parapet at the drainage outlets of the roofs. The water coming out through the above collectors shall be drained into external down spouts, according to plans.

k) The waterproofing of the penetration areas of pipes into the roof concrete, by the use of bitumen sheets and elastomeric- bitumen putty (B-4), according to the special detail.

l) The casting of concrete raised surfaces for the air conditioning units, on top of the third 5 mm thick APP polymer improved bitumen membrane (B-5) including a polyester felt reinforcement, which is to protrude at least 100 cm from each side of the raised surface.

m) The waterproofing of the peripheral drainage channel on the metal roof, with elastic hydraulic cement (PL-3) material standing up to the requirements of Standards Institute Specification 390, Part 1.

n) Equipment installed on the roofs shall be set up on top of raised concrete surfaces. The installation of horizontal pipes on the roofs shall be performed on top of the tiles with a foamed polystyrene (I-4) substructure. Around the equipment fixed on the roof, access pathways are to be installed, made up of pavement concrete tiles with a foamed polystyrene (I-4) substructure. The

13580 16 Construction Documents pathways shall lead from the roof access outlet to each piece of equipment and then surround it.

The roofs shall have drainage outlets in accordance with the roof sloping drawings, at the rate of 1 outlet for each 70 sq. m.

05.06.02 Preparation of the roof sub-base for the performance of the waterproofing works

a) The preparation for the roof sub-base for the performance of the waterproofing works shall be carried out according to the directives of Israeli Standards No. 1752, Part 1. The surfaces shall be clean and dry, smooth, devoid of "steps", high spots, depressions or holes.

b) The parapet surfaces in the roof's perimeter above the water-drop, must be covered with cement mortar to which an acrylic adjuvant has been added, having a total thickness of 2 cm.

05.06.03 The installation of a vapor barrier and of thermal insulation on the roofs

a) The sub-base shall be thoroughly cleaned until a plane and stable concrete is reached, free from dirt, dust, grease, etc.

b) The sub-base shall be covered with a coat of bitumen primer (B-3) standing up to the requirements of Standard ASTM D 41, at the rate of 300 gr/sq.m.

at least 4 hours have to elapse before renewal of work.

c) On top of the bitumen primer coated sub-base, a bitumenic vapor barrier shall be created by the spreading of a 75/25 blown bitumen (B-9), by the heated method. The bonding shall be full over the whole surface. The membranes are to be bonded with 10 cm overlaps one over the other. The vapor barrier membranes shall be made up of a glass fiber membrane weighing 60 gr/sq.m, an aluminum foil 25 micron thick (B-6) covered with blown bitumen on both sides. The minimal thickness of the membrane shall be 1.4 mm and its weight shall be 1.5 kg/sq.m; it shall be characterized by an indefinite resistance to the passage of vapor.

d) Foamed polystyrene (I-4) boards, are to be glued on top of the vapor barrier membranes, 4 cm thick and standing up to the requirements of Israeli Standards No. 1229, Part 1; the bonding shall be carried out with 75/25 blown bitumen (B-9), by the heated method; the bonding shall be full and cover the whole surface.

05.06.04 Casting of lightweight concrete slope formation

The foamed polystyrene boards (I-4) are to be covered with a slope formation layer made up of lightweight concrete (CF-3), at a minimal slope of 1.5%, according to the slopes drawings. In roofs where the designed maximum thickness of the light concrete is greater than 20 cm, the slopes shall be executed with "Bet Kal" weighing 1200 kg/cu.m and a minimum pressure resistance of 4 Megapascal, as per the directives of Israeli Standards No. 1513.

The minimum thickness of the Bet-Kal shall be 5 cm. The formation of the slopes shall be carried out as follows:

a) Check that the drainage outlets in the roof are properly sealed so as to avoid

"Bet- Kal" penetration in the course of its pouring, or following it.

b) Install wires materializing the slope, according to the required slope formation drawing. Slope shall be at 1.5%.

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c) Prepare the light concrete according to the directives and apply it on top of the foamed polystyrene boards on the roof.

d) Fully cure the light concrete during 30 days at least. In the case of the appearance of cracks, they shall be sealed prior to the waterproofing operations.

05.06.05 Making fair the polymeric-cementic seals

a) Following the pouring of the slope formation and its curing, seals are to be installed at the intersection of horizontal sub-bases with parapets, made of polymeric-cementic mortar (CF-4). The seals, 5 x 5 cm, shall be concave and made fair with acrylic-cementic mortar with the following composition:

- 50 kg of cement

- 120 kg of sand

- 10 kg of acrylic adjunctive (about 20% of the cement weight).

- water as required

b) The application shall be carried out by sprinkling the mortar, followed by the tight laying of the interglass mesh and when dryness is achieved by the filling-in with mortar for complete cover.

05.06.06 Directives for the application of the waterproofing system

a) Thirty days at least after the completion of the light concrete casting and not less than one week after the first rain, the bitumen primer (B-3), standing up to the requirements of Standard ASTM D 41, shall be laid on the surfaces meant to be waterproofed, at the rate of 300 gr/sq.m. Four hours are to elapse prior to the resumption of the waterproofing works.

b) The surfaces meant to be waterproofed are to be covered with 85/40 blown bitumen (B-9), at the rate of 1 kg/sq.m, for leveling and smoothing.

c) Reinforcement bitumen membrane similar to those of the sub-base waterproofing, 4 mm thick (B-1), with light and surface finish, are to be installed on the roof's perimeter, at the intersection of the horizontal sub-base and the vertical surfaces. The width of the reinforcement membranes shall be such that at least 10 cm of the membrane protrude and shall be welded to the horizontal sub-base. The membrane shall overlap by 10 cm.

The edges of the reinforcement membranes shall be pressed ("ironed") so as to prevent the formation of a step in the main waterproofing layer.

d) One first layer of APP polymer improved bitumen membrane (B-1), 4 mm thick, shall be welded to the horizontal sub-base. Its surface finish shall be with a fine material and it must stand up to the requirements of Israeli Standards No. 1430, Part 3, at level M. The overlap between consecutive membranes shall be 10 cm and they shall be welded in overlaps to the reinforcement membranes.

e) The lower layer of the cover membranes in the vicinity of intersections of horizontal sub-bases with vertical surfaces shall be welded together. The covering membrane shall be 4 mm thick and it shall be similar to the waterproofing sheets with a fine surface finish. The above covering membranes shall be welded, with 20 cm overlaps, to the lower surface waterproofing membranes as well as to the vertical surfaces up to a height of about 20 cm. The covering membranes shall be welded one unto the other with 10 cm overlaps. The overlaps between the covering membranes

13580 18 Construction Documents shall be staggered in such a way so that the distance between them and those of the lower layer shall be at least 1/3 of the membrane's width.

f) The APP polymer enriched bitumen membranes of the waterproofing layer shall be welded to the lower layer installed on the roof's sub-base; their surface finish shall be of white aggregate (B-2), their thickness 4 mm and they shall stand up to the requirements of Israeli Standards No. 1430 at level M. The membranes shall be welded one unto the other with 10 cm overlaps.

Attention shall be given to the overlaps, making sure that at least 1/3 of the sheet's width separates the overlaps from those of the layer under.

g) At the intersection of horizontal sub-bases with vertical surfaces, the upper cover membranes shall be similar to those of sub-base waterproofing membranes, with a white aggregate surface finish. The membranes shall be welded one unto the other with 10 cm overlaps. The above membranes shall be welded with 20 cm overlaps to the upper sub-base waterproofing membranes and welded unto the vertical surface up to the lower edge of the water-drop in parapets having a water- drop or up to 30 cm in vertical surfaces without water-drop. Pressure shall be exerted on the heated upper edge of the covering membrane, along all the length of the vertical surface, on a width between 1 and 2 cm.

h) The edges of the upper covering membranes shall be fastened to the vertical surfaces with a 10 x 35 x 5 mm aluminum section and special "Phillips" holders at 20 cm intervals. These holders shall be of the type drilled into the parapet, of the HILTI type 5/6 HPS gap or UPAT-UN ts/6/36, the diameter of the drill being 5 mm and its depth 35 mm. The gaps between the concrete and the aluminum section are to be filled with polyurethane- elastromeric sealing putty (S-6), standing up to the requirements of Israeli Standards No.

1536, of the F-25HM type.

i) The penetration of pipes into the roof concrete shall be waterproofed as follows: - Around the penetration area of the pipe into the concrete, a 7 x 7 cm fast setting polymeric concrete mortar seal (CF-4) shall be applied. At the next stage, the passage of the above pipe shall be waterproofed with 2 covering/ reinforcement bitumen strips similar to the sub-grade waterproofing membranes (B-1), 4 mm thick each (the reinforcement strips shall have a fine surface finish and the covering strips a white aggregate surface finish) (B-2). The upper edge of the cover strip shall be fastened with a bell-ring made of galvanized steel and an elastomeric- bitumenic sealing putty (B-4) shall be applied.

j) The overlaps between adjacent membranes shall be covered with aluminum- bitumen based paint (P-18), standing up to the requirements of Standard ASTM D- 2824, type 1; it shall be applied in 2 coats at the rate of 300 gr.sq.meters.

k) Those parts of the parapet which are above the water-drop are to be covered with an elastic acrylic material (P-12.13.14.15) standing up to the requirements of Israeli Standards No. 1731, at a rate of 1-1½ kg/sq.m.

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05.06.07 The waterproofing of drainage outlets in the roof

a) At the drainage outlets in the roof, plastic water collectors are to be installed, with a horizontal outlet through the parapet, 4" or 6" in diameter.

The water from the collectors shall be drained towards the external down spouts.

b) The collector shall be composed of a pipe and a bitumen or neoprene collar to which the bitumenic waterproofing membranes are to be welded. Prior to the introduction of the collector's pipe into the drainage outlet, it shall be covered with elastomeric waterproofing putty standing up to the requirements of Israeli Standards No. 1536 (with good bonding qualities for adhesion of the material from which is made the collector, to the concrete).

c) The openings of the collectors, at the end of the waterproofing works, shall be equipped with fitting plastic grilled hoods, blocking the passage of leaves and rubble into the inlets of the above collectors.

05.06.08 The installation of air conditioning units on the roofs, on top of raised surfaces

a) In the area reserved for the pouring of raised concrete platforms, a third 5 mm thick APP polymer enriched bitumen membrane (B-5) has to be welded to the sub-base waterproofing membrane; its surface finish shall be of fine sand, it shall stand up to the requirements of Israeli Standards No. 1439, part 3 at level M and it shall protrude by 100 cm on each side of the designed raised concrete platform.

b) On the top of the above protective layer, the raised platform shall be cast and the A/C unit shall be installed on top of it.

05.06.09 The waterproofing of the peripheral concrete drainage channel on a steel sheet roof The waterproofing of a peripheral concrete drainage channel in a steel sheet roof, 1.5 m wide and with walls 15 cm high, shall be performed with an elastic hydraulic cement material (PL-3), standing up to the requirements of Standards Institute's Specifications No. 390, Part 1. in the following way:

a) At the intersection of the horizontal sub-grade with the walls, a 5 x 5 cm seal shall be installed (CF-4), made up of fast-setting hydraulic cementic material, as mentioned above.

b) Thorough cleaning of the sub-base shall be completed, removing all dirt, high spots; cracks shall be sealed and holes filled in with cementic material, as mentioned above.

c) On top of the horizontal sub-grade and of the walls, an elastic hydraulic cementic material standing up to the requirements of the above mentioned specifications shall be laid in several coats, at a total rate of 4 kg/sq.m, according to the directives of the manufacturer of the said material.

d) After the completion of the waterproofing works, a flooding test shall be performed on the drainage channel, as per the directives of Israeli standards No 1476, Part 1.

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05.07 Directives for Waterproofing the Tiled Covered Passage

05.07.01 Generalities

a) The directives for waterproofing the tiled covered passage between floors, which represents the floor of level 1, are detailed hereinafter. The waterproofing shall be performed with a one-layer system of APP polymer enriched bitumenic membranes, 5 mm thick (B-5), standing up to the requirements of Israeli Standards No. 1430 , Part 3 at level M, for membranes of that category. The waterproofing membranes shall be covered with a polyester geotextile protection membrane weighing 400 g/sq.m (B-7), standing up to the requirements of Israeli Standards No.1463.

On top of the above protection membranes, a 5 cm thick mortar layer shall be poured (CF-2), as per the instructions in the Contract Documents, on top of this layer, tiles shall be laid (on top of sand and a cementic mortar). The waterproofing of the intersection of the horizontal sub-base and the vertical surfaces along the walls, shall be performed with two reinforcement/ covering membranes (B-5), the upper cover membranes going up at 15 cm above the projected tiles level and being fastened to the sub-base with a flat section. The slopes in the above passage shall be obtained by the tiling. The water in the covered passage shall be drained from the tiles' surface into the 15 cm wide concrete channel, the walls of which shall be 15 cm high; a grid shall be installed on the top. The floor of the drainage channel is the covered passage floor waterproofed with bitumenic membranes. The second wall of the 15 cm high shall be cast above the bitumenic waterproofing membranes. On the vertical walls and the horizontal sub-base of the drainage channel, which are waterproofed with the help of bitumenic membranes, elastomeric bitumentic coats (B-8) at the rate of 4 kg/sq.m. are to be laid. The 1% slope in the drainage channel shall be created with B-15 concrete (CF-3) poured above the horizontal waterproofing layers.

Following the curing of the slope- formation concrete, elastic hydraulic cementic material (PL-3), standing up to the requirements of Standards Institute Specifications No. 390, Part 1, shall be laid down at the rate of 3 kg.sq.m.

b) Following the completion of the covered passage waterproofing works and prior to its tiling, a flooding test shall be carried out, as per the directives of Israeli Standards No. 1476, Part 1.

05.07.02 The preparation of the sub-base to the waterproofing works

a) The sub-base shall be thoroughly cleaned from all rubble, dust, grease until a plane and stable concrete is obtained. Repairs are to be carried out on the concrete surface of the horizontal sub-base and of the vertical surfaces such as: the removal of high spots, the sealing of holes and depressions with polymeric cementic mortar, the sealing of cracks. A dry mechanical smoothening of the concrete surface shall be performed until plane, smooth and dry surfaces are obtained. The cracks or concrete stoppage joints are to be sealed as follows: with the help of an appropriate disk, the crack shall be enlarged both in depth and width so as to reach a width of 1 cm and depth of 1 cm; the walls of the gaps obtained shall be cleaned and dried up, prior to the application of the waterproofing material. The sealing material used

13580 21 Construction Documents shall be an elastomeric- polyurethane seal standing up to the requirements of Israeli Standards No. 1536, type F-12.5E.

b) The intersection of the horizontal sub-base and the vertical walls has to be treated with a seal made of polymeric-cementic mortar (CF-4). The seals, 5 x 5 cm, shall be concave and made fair with acrylic- cementic mortar with the following composition:

- 50 kg of cement

- 120 kg of sand

- 10 kg of acrylic adjunctive (about 20% of the cement weight).

- water as requested

c) The application shall be carried out by sprinkling the mortar, followed by the light laying of the interglass mesh and when dryness is achieved by the filling- in with mortar for complete cover.

d) In areas of intersection with doors adjacent to the above passageway, B-20 concrete thresholds are to be cast along the width of the doors, with minimal height of 10 cm.

05.07.03 Directives for the performance of waterproofing works

a) The horizontal sub-base and the vertical surfaces to be waterproofed are to be covered with a bitumenic primer (B-3) standing up to the requirements of Standard ASTM D-41, at the rate of 300 gr/sq.m. 4 hours are to elapse prior to the resumption of the waterproofing works. The bitumenic primer coat shall be covered by an 85/40 blown bitumen (B-9), at the rate of 2 kg/sq.m.

b) Reinforcement bitumen membranes similar to those of the sub-base waterproofing, but 5 mm thick (B-5), with tight sand surface finish, are to be installed at the intersection of the horizontal sub-base and the vertical surfaces, The width of the reinforcement membranes shall be such that at least 10 cm of the membrane protrude and shall be welded to the horizontal sub- base and that about 10 cm of the membrane shall be welded to the vertical sub- base. In the area of the raising of the drainage channel, the reinforcement shall reach the top edge of the above concrete raising. The membranes shall be welded one to the other with 10 cm overlaps. The edges of the reinforcement membranes are to be "ironed" so as to prevent the creation of steps in the main waterproofing layer.

c) One layer of APP polymer improved bitumen membrane, 5 mm thick, shall be welded to the horizontal sub-base. Its surface finish shall be with a fine material and it must stand up to the requirements of Israeli Standards No.

1430. Part 3, at level M. The overlap between consecutive membranes shall be 10 cm and they shall be welded in overlaps to the reinforcement membranes.

d) In the area of the walls, 4 mm thick cover membranes (B-1), similar to the reinforcement membranes with a fine sand surface finish, shall be welded at the intersection of the horizontal sub-base with the vertical surfaces, with at least 20 cm overlaps on the sub-structure waterproofing membranes; they shall be welded unto the vertical surfaces at the side of the walls, up to 15 cm above the designed tiling level. The covering membranes shall be welded one to the other with 10 cm overlaps. The overlaps between the covering membranes shall be staggered so that the distances between them and the overlaps in the lower layer shall not be less than 1/3 of the membrane's width. Pressure, under heat, shall be exerted on the upper edge

13580 22 Construction Documents of the covering membranes, along the whole length of the vertical surface on a width between 1 and 2 cm. Elastomeric- bitumenic sealing putty (B-4) shall be applied on the upper edge of the covering membrane, fastening to the proper location shall be obtained with a flat section. The covering membranes protruding above the tiles level shall be covered with mortar, including an acrylic adjuvant reinforced with and expanded metal grid.

05.07.04 Protection of the waterproofing

a) Unwove polyester geotextile protective membranes…