Attch_15_HNTRs_Site_13580.pdf

Prepared Date: 15 October 2012

Complete List of HNTRs

Contractor shall adhere to HNTRs that are applicable to the specific project details.

HNTR 01 – General Specifications for Earthworks

HNTR 02 – General Specifications Cast In-Situ Concrete Works

HNTR 03 – General Specifications for Precast Concrete Products

HNTR 04 – General Specifications for Masonry Works

HNTR 05 – General Specifications for Waterproofing Works

HNTR 06 – General Specifications for Joinery and Steel Works

HNTR 07 – General Specifications for Sanitary Installations

HNTR 08 – General Specifications for Electrical Installations and Take-off Procedures

HNTR 09 – General Specifications for Plastering Works

HNTR 10 – General Specifications for Flooring and Covering Works

HNTR 11 – General Specifications for Painting Works

HNTR 12 – General Specifications for Aluminum Works

HNTR 13 – General Specifications for Prestressed Concrete Works

HNTR 14 – General Specifications for Stone Works

HNTR 15 – General Specifications for Air-Conditioning Installations

HNTR 16 – General Specifications for Heating and Steam Installations

HNTR 17 – General Specifications for Elevators

HNTR 18 – General Specifications for Communication Infrastructure

HNTR 19 – General Specifications for Steel Structures Works

HNTR 21 – General Specifications for Precast Concrete Constructions

Solicitation W912GB-16-R-0030 Site 13580 - Israel (Attachment 15)

Prepared Date: 15 October 2012

HNTR 22 – General Specifications for Pre-Fabricated Elements in Building

HNTR 23 – General Specifications for Piles Bored and Cast In-Site

HNTR 34 – General Specifications for Fire Detection and Fire Extinguishing Systems

HNTR 36 – General Specifications for Compressed Air Installations

HNTR 40 – General Specifications for Site Development

HNTR 41 – General Specifications for gardening and Irrigation Works

HNTR 43 – General Specifications for Outdoor Lighting

HNTR 50 – General Specifications for Concrete Pavements

HNTR 51 – General Specifications for Paving Runways, Roads and Aprons

HNTR 57 – General Specifications for Water Lines, Sewage and Channeling

HNTR 66 – General Specifications for Protective Locksmithing

HNTR 67 – General Specifications for Antenna Mast Installations

Solicitation W912GB-16-R-0030

GENERAL SPECIFICATIONS FOR

EARTHWORKS

Table of Contents

0100 - GENERAL

0101 - PREPARATION AND DISMANTLING WORKS

0102 - EXCAVATION WORKS

0103 - QUARRYING

0104 - COMPACTION AND TAMPING

0105 - WRAPPING AND BEDDING

Solicitation W912GB-16-R-0030

0100 - General

01000 - General

010001 - Scope

These specifications refer to common earthworks for building constructions. Special preparation works such as building, demolition or special supports required due to proximity of buildings or work under the level of the aquifer shall be specified in the particular specifications.

01002 - Definitions

Earth and soil - the terms refer to any type of natural material, including rock.

Layer thickness - is the thickness after the compression and compaction, to be carried out according to the specifications pertaining to that layer.

Back-fill (borrowed fill) - soil taken from the building site for filling purposes.

Brought up fill - fill brought from places out of the building site for filling purposes.

Surplus soil - excavated soil not used in the construction.

01003 - Standards

Tthe following is the main standard pertaining to this chapter:

Sorting of soils according to AASHTO ASTM-D-3282 - Classification of Soils and Soil-Aggregate Mixtures for Highway Construction Purposes.

01001 - Other Chapters

All the provisions in the chapters of the general construction works specifications, as detailed below, are also applicable to the present chapter.

Chapter 02 - In-Situ Cast Concrete Works

Chapter 57 - Water Lines, Sewage and Trenches.

01002 - Casing and Support

The sides of excavations shall be cased and supported, in case that the soil requires casing, whether the supervisor has required that this be done or not. The boards and supports shall be sufficiently strong and rigid to sustain the pressure of the soil and prevent collapse or horizontal movement of the casing. Alternatively, if soil conditions permit it, the contractor shall be able to shape the sides of the excavations according to their natural slopes , instead of casing and supporting the soil.

01003 - Responsibility for Stability

The provisions included in these specifications are guidelines for the best professional execution. Carrying out these instructions is not enough to absolve the contractor of his legal responsibility, and he shall be solely responsible for the stability of the excavation and the safety of the earth works carried out at the site, including safety of the structures and the roads in the vicinity of the site, and all that this entails.

01004 - Collapse

In the event of a collapse due to insufficient support, or any other reason, the contractor shall re-excavate the pit and repair the casing and support. Moreover, the contractor shall bear the cost of all damages to people or property incurred by the collapse, and he hereby absolves the manager of any claims, which may arise in this context.

Solicitation W912GB-16-R-0030

01005 - Drainage

All excavations described above shall be protected against the penetration of rainwater, by the adoption of appropriate means such as excavation of drainage trenches, or the creation of temporary earth banks. If rainwater or sewage water have accumulated in the excavated pits, despite the means adopted by the contractor, the contractor shall remove the water from the excavations and allow the bottom to dry sufficiently, to the supervisor's satisfaction, before he resumes work. These instructions also apply to back- fill.

The excavation and fill and excavation in back-fill areas etc. shall be carried out in such a way as to allow constant drainage of the water during all the stages of work. The means of drainage shall include works as excavation of temporary trenches, building of banks, pumping of water, blocking of pits, etc.

01006 - Ground Water

When work is carried out in areas where ground water is expected or where ground water was detected during work, the contractor shall pump the water by the means and methods approved by the supervisor. The pumping shall be consecutive and sufficient for ensuring dry pits, as required for carrying out the work. The contractor shall also take care to dispose of the pumped water to a site selected at his own responsibility, with the approval of the supervisor given in advance.

01007 - Coordination and Disturbances

The contractor shall carry out the work in coordination with the operating conditions prevailing at the site, including the function of electricity, water, irrigation and sewage systems, etc., subject to the directions of the responsible authority. Moreover, coordination and cooperation must be ensured with other parties or contractors working at the site - as instructed by the supervisor from time to time. The contractor shall take all means required to prevent disturbances and holdups of traffic, including marking with lamps and flags, signposts and the positioning of permanent employees to direct the traffic, etc.

Special requirements and limitations shall be defined in the particular specifications or the plans.

In built and populated areas, the contractor must carry out the work in such a way that all in-situ systems shall continue to work and function without disturbance, including access to buildings, free pathways and the proper function of electricity, water, sewage and irrigation systems.

01008 - Returning the Area to its Former State

The contractor shall return to its former state, any area dismantled or damaged following preparation, dismantlement, or cleaning works, or earthworks of any kind, for any purpose whatsoever, including in-situ installations such as cells, trenches, drainage installations, etc.

In addition to the above, in paved areas, the contractor shall apply all of the paving layers -asphalt, concrete tiling of various types, etc.

The area shall be returned to its former state by means of new materials and products, except where the supervisor has approved the use of materials and products from the dismantlement.

The contractor is responsible to ensure that there are no pits in the area repaired by him.

0101 - Preparation and Dismantling Works

01010 - General

Before starting the earth works (excavation and fill) the contractor shall carry out all the works required below (removal or exposure of vegetation, removal of waste and obstacles), as well as additional works, as required by the plans or the supervisor's instructions, so that the soil surface obtained shall be free of shrubs, weeds, structures, pipes, concrete wastes, etc.

The execution schedules of each of these activities shall be determined by the supervisor, in no case shall an area in which the vegetation has been removed, be exposed.

01011 - Removal of Vegetation and Cleaning

Removal of vegetation and cleaning, involves the uprooting of existing vegetation (shrubs and weeds) including its roots, and removing and dispersing it. The cleaning of the area includes removal of any garbage or alluvial sedimentation and their disposal as detailed in section

01017 below .

Vegetation not defined as a tree, which has been explicitly described in the particular specifications as not included in this section of "removal of vegetation", shall be considered as special vegetation. Such special vegetation shall only be removed according to a plan, or according to the written instructions of the supervisor.

If it is required to preserve part of the vegetation, the contractor shall do so according to the requirements in chapter 41 - gardening and watering works, and in the particular

01012 9 Exposure

Exposure includes removal of existing vegetation (shrubs and weeds) and the upper soil layer, up to a thickness of 20 cm., and then disposal and distribution of this layer as described in section 01017. Exposure shall be carried out according to a plan, or after the CO has approved the execution and its scope in advance.

01013 - The Cutting Down and Uprooting of Trees

010131 - Cutting Down Trees

Any vegetation, whose bark circumference is at least of 15 cm at a height of 1.0 meter above ground, shall be considered a tree. Any tree whose circumference is less than 15 cm shall be considered vegetation (section 01011 above). If a number of tree trunks branch out from the same root, i.e., originate from the soil, each one of them shall be considered as a separate bark, if it complies with the above definition.

The contractor must cut the trees close to ground, but not less than 5 cm. from the surface nor higher than required by the CO. If it has not been specified otherwise, the contractor shall cut the trunks and branches with a circumference of 15 cm and above, into segments of 1.0 to

2.0 meters, according to the supervisor’s instructions. Trunks and branches, with a circumference less than 15 cm., shall be removed as detailed in section 01017.

The contractor shall pile all the trunks and branches cut as above in locations indicated by the

CO within the site, in such a way that they shall not constitute a nuisance and shall be available to the office. Cut trees from which it shall not be necessary to chop branches, shall be handled separately as detailed in section 010134, or shall be removed as detailed in section

01017.

010132 - Uprooting Tree Stumps

In the event that the contractor received an area with the stumps of trees cut down by others to a height of 5 cm at least, and not arched before they were cut, and the circumference of their section at the cutting level is greater than 15 cm., shall be considered, for the purpose of uprooting, as if they were trees with a circumference of 15 cm diameter at a height of 1.0 meter.

Tree trunks that have been cut shall be uprooted and removed as described in section 01017.

The pits created by the uprooting shall be filled with the best local back-fill or with brought up fill, which shall be compacted in 20cm thick layers, up to the planned level of the excavation (or the natural ground level, if there is no excavation).

If required, the pits shall be sprayed with a weed killer (see section 01014 below).

010133 – Trees Uprooting

If not stated otherwise, the work of uprooting trees shall include all the works included in the above sections of uprooting and cutting, but the works may be carried out in the order suitable to the contractor. In the event than the entire job consists of uprooting alone, it shall be classified as a separate job.

010134 - Special Trees

The following shall be included in the category of special trees: Trees protected by law, defective trees which are not suitable for sale and trees located in the vicinity of buildings or installations. The uprooting of special trees or their transfer for replanting in an alternate location shall be carried out according to the provisions of the particular specifications. This should be classified as a separate job.

01014 - Weed Killers

Areas covered with weeds, areas from which the vegetation has been removed, exposed area and the pits from which trees have been uprooted - shall be sprayed with a weed or root killer.

The spraying shall be defined in the contract document. The contractor must locate and define the weeds at the site and find the appropriate chemical material for killing that specific type of vegetation. The herbicide shall be sprayed by a contractor authorized to carry out such work by the Ministry of Agriculture.

The contractor shall make sure that the wind conditions are appropriate for spraying and shall ensure that no environmental damage is caused.

01015 – Dismantling

010151 – Dismantling of Buildings

Wherever required to do so, at whatever length and depth, the contractor shall dismantle both surface and underground buildings, such as; existing concrete trenches, drainage lines containing concrete pipes and stone fill, acquaducts, control-cells, embankments and the like.

Foundations or surface buildings shall only be dismantled down to a depth of 1.0 meter below the subgrade surface. The work includes removal of concrete and stone pieces, etc. as detailed in section 01017 below.

010152 – Dismantling Pavements

If required, concrete pavements and asphalt pavements shall be dismantled along their entire constructional depth down to the subgrade. In asphalt pavements, if dismantling is needed for laying a new road or for repair - the asphalt layer shall be sawn off within the dismantling boundaries. Dismantling the pavements shall include removal of the waste from the area according to section 01017 and compaction of the surface after dismantling , until the required

Solicitation W912GB-16-R-0030 density is obtained. When dismantling concrete plates, the plates shall be broken into parts small enough to be loaded and disposed of.

01016 - Blocking of Pits and Trenches.

The contractor shall use local back-fill of the quality approved by the CO. In order to block any pits or trenches created following the above dismantling . The contractor shall compact the fill in layers up to the required level, according to the plan, or the CO’s instructions.

01017 - Removal of Waste

The waste shall be removed.

In those cases where the CO shall allocate an area to which the waste should be removed, the contractor shall bury the waste in the ground and cover it with a layer of soil, at least 60 cm.

Thick , in such a way as to allow good drainage and to ensure that the additional height shall not exceed 100 cm. above the final surrounding surface area. As an alternative to burying the waste, the contractor shall be entitled to remove it from the site. The selection of a place for removal, the roads leading to it and the right of the contractor to use it, are the sole responsibility of the contractor.

0102 - Excavation Works

01020 - General

In addition to the provisions of the "Surveying and Marking" section in Chapter 00: If in the opinion of the CO, the ground preparation works (such as the removal of vegetation, the uprooting of trees, etc.) have caused such changes in the topographic state as to require renewed Surveying - the contractor shall be obliged to survey and mark again.

01021 - Types of Soil and Earth

The present specifications classify the soil and earth into two types only: rock or any other soil. A rock shall be considered any continuous layer of solid rock or large stone slabs, which can only be quarried by means of penetrometers, compressors, wedges, sledgehammers or the use of explosives.

Any soil, which may be handled with tractors of all kinds, even when operated in their strongest gear position, shall not be considered rock.

The decision regarding the classification of the soil to one of the above types is given entirely to the CO’s discretion and his decision in this regard shall be binding and final.

The term "excavation” in all of the sections of these specifications relates to quarrying in rock, even if this has not been explicitly noted in each section.

Thus all of the sections referring to excavation works in these specifications also apply to quarrying, subject to the additional requirements presented in sub-section 0103 below.

01022 - Excavation

010221 - Area Excavations

Excavation in the area shall be carried out according to the details of the plans, or as required in order to lower the level of the existing soil surface, down to the levels determined by the

CO. In the case of soil surpluses, the best excavated soil, which in the CO's opinion conforms to the requirements and may serve as an appropriate fill, shall be transferred to the planned fill areas and distributed there as provided in the section concerning fill.

Excavation of aqueducts and excavation of pits (trenches) shall be discussed below.

010222 - Excavation Below the Required Level

In the event that the excavation has been performed by the contractor to a depth greater than required, the contractor shall refill it up to the required levels with an appropriate fill material as approved by the CO. This fill material shall be free of stones, silt, organic material, etc. and shall be distributed in layers no thicker than 20 cm.

Mechanical compacting tools shall be used to compact the layers after sprinkling an optimum amount of water.

The compaction shall proceed until the natural density characteristic of soil at this depth is achieved. Any voids created following excess excavations below foundations, etc. shall be filled with lean concrete.

The provisions of this section also apply to excessive excavation, even in a multi- layer rock.

010223 - Digging of Trenches

If not stated otherwise, an excavation no wider than 2.0 meters, whose depth is no less than 50

cm. below the original soil surface shall be defined as a trench. The bottom and sides of the trench shall be shaped to the desired gradient.

010224 - Excavation of Basements

Excavations for basements and subterranean structures shall be carried out according to the dimensions specified in the plans and with consideration for the ground conditions, the work spaces and the need for casing, formworks, supports, sealing and any other goal (see section

01002 above and section 010227 below). The earth from the excavation shall be temporarily stored in nearby heaps. The bottom of the excavation shall be shaped according to the required levels and gradients and shall be compacted as detailed in paragraph 0104. The best the excavated soil, which in the opinion of the CO may serve as an appropriate fill, shall be used both for back-fill as detailed below and for fill in any other place in the site.

The back-fill around the external walls shall only be carried out when all of the works to be covered with soil are completed, and after all of these works have been inspected and approved by the CO. The back-fill shall be comprised of layers, whose thickness after compaction shall not exceed 20 cm., as detailed in paragraph 0104. If the CO shall so demand, the layers shall be compacted with a heavy manual compactor and sprinkled with water in the required amount.

The back-fill restored along structural walls coated on the outside with sealing layers, shall be free of stones and large clods or any other waste liable to damage the sealing and the entire work shall be carried out with proper care.

010225 - Excavation for Foundations.

Digging of trenches for strip foundations, foundation beams, connecting beams, etc. and digging of trenches for foundation stanchions, bases, containers etc. shall be carried out both at the level of the original or leveled ground surface, and from the bottom of the pit excavated for basements and subterranean buildings, as detailed in section 010224 above. Should the sides of the excavation remain uncased - loose stones or earth clods shall be removed from them, in order to prevent them from sliding.

010226 - Excavation for Pipes

Trenches for pipes shall be dug down to the levels corresponding to the design pipe laying levels (invert level) and shall be sufficiently wide to accommodate the work, on condition that in no case shall the width of the bottom be smaller than the external diameter of the pipe plus

20 cm on each side. In those places where bedding or a protective covering is required around the pipes, the trench shall be deepened accordingly. In places where no bedding is to be

Solicitation W912GB-16-R-0030 placed, pockets shall be excavated at the bottom of the trench, so as to accommodate pipe fixtures or connectors. Each trench in a pipeline shall be excavated in a single session along its entire length and to its entire depth, between one cell and another - and this shall be done before the pipes are placed in it. Special care shall be taken to thoroughly compact the bedding or the back-fill below the pipe and up to half its height.

Moreover, special attention shall be given to compacting the pipelines below the concrete surfaces or tiled areas. The excavation for cables shall be carried out as required in the appropriate chapter, i.e., chapter 08 - electrical installation, 43 - external lighting, etc.

010227 - Workspaces

Workspaces for the purpose of casing, formworks, sealing or any other purpose, in all types of excavation and quarrying works, shall be determined by the contractor according to need, as stated above.

01023 - Transfering the excavated soil.

The transfer of excavated soil mentioned in all of the previous sections or those below shall be carried out according to the CO's instructions. The CO shall determine the type of soil, the part of the soil to be transferred to other places, the part to be used for fill and the part to be removed. When the soil surplus intended for transfer is placed in a heap, care should be taken to ensure appropriate drainage arrangements.

The contractor shall remove any soil surplus outside the site, as described in the particular specifications, if the contractor is given a map, in which the areas for excavation surpluses are marked, the contractor must transfer the soil to the marked area and spread it there in layers, according to the particular specifications or the CO's instructions.

01024 - Filling with Soil

010240 - General

The best soil approved as fill shall be brought from the excavation areas and spread in the layers and levels specified in the plan, or according to the CO's instructions, then compacted to the required density and moisture.

010241 - Borrowed Fill

Should the best of the excavated soil prove insufficient for filling, the shortage shall be made up with soil borrowed from the surrounding earth. The selection of a place in which to excavate borrowed fill and the quality of the soil taken from that place, both require the CO’s authorization.

The surface of the area intended for borrowed fill excavation, shall be stripped to a depth of

20 cm. at least, and the soil and vegetation etc. from the stripping shall be handled like any other waste and removed from the site.

Filling with borrowed fill shall be carried out as detailed in regard to filling works above.

010242 - Brought up Fill

In the absence of appropriate local soil suitable for making up the shortage of soil for filling, clean soil, free of stones, silt, organic materials or any other undesirable material, shall be brought from outside the site.

The imported soil and its source shall conform to the requirements of the specifications and require the CO approval.

When required, trenches and pits shall be wetted before casting.

01025 - Approval of Excavation and Filling

The bottom of the excavation and the fill surface and the various types of bedding, as detailed below, require all the CO approval Casting, or the works of covering the castings, shall not be commenced without the CO approval. When required, trenches and pits shall be wetted before the casting.

01026 - Boring of Piles

Pits for piles shall be bored in the diameters and depths marked in the plans or according to the CO instructions. Vertical bores which penetrate through stable soil layers, shall be bored without casing, on condition that they are vertical and that the concrete shall be cast into them on the day they are bored, immediately following their inspection and approval by the CO.

Inclined bores as well as vertical bores through loose soil lor through types of soil requiring casing for any reason whatsoever, shall be bored in such a way as to ensure the stability of the sides at any depths, by means of steel pipes.

Expansion at the bottom of the piles, if required in the plans, may only be carried out in stable soil layers. The dimensions of the bore and of the expansion shall be inspected by the CO by means of appropriate measuring instruments and light beams directed into the bore hole (see section "Piles and special castings” in Chapter 02 - The general specifications for cast in-situ concrete works).

01027 - The Slurry Method

Stabilization of the excavation's sides by means of the slurry method, for the purpose of casting supporting walls, includes;

A. Cutting the soil with the special equipment required by the slurry method in order to shape a trench corresponding to the dimensions of the walls.

B. Preparation of the slurry itself, from a mixture of materials prepared at the plant and supplied in a closed package, to be mixed at the site with water.

C. Insertion of the slurry into the trench.

Supplying the concrete and casting it into the walls;

D. Removing the slurry pushed out by the pressure of the concrete as it is cast in the walls.

The contractor shall present for the work plans for the CO approval, at least two weeks before the beginning of work. The plans shall specify the length of the wall sections, the rate of casting, etc. The CO shall authorize the work after it is shown that all the equipment is appropriate to the soil's quality, the plan ensures progress without casting interruptions, and alternative equipment and means are available if necessary.

Soil cutting works shall be considered excavation rather than quarrying. The concrete requirements shall be as detailed in Chapter 02 - The general specifications for cast in-situ concrete works.

0103 - Quarrying

01030 - General

If not noted otherwise, quarrying shall be defined as an excavation that may only be carried out with the use of penetrometers, compressors, wedges or the use of explosives.

Any work that can be carried out with tractors of any kind, even when operated in their strongest gear position, shall not be considered quarrying. Such quarrying shall not be commenced unless the CO has reached the conclusion that the work cannot be carried out

Solicitation W912GB-16-R-0030 except through the above detailed means, and after the CO has given his written authorization to quarry the rock as above. The material approved for usage as fill shall be transferred and distributed as detailed in section 01032.

The surpluses shall be transferred and distributed as detailed above in section 01023 (the void created following the quarrying shall hereinafter be termed "excavation", as it is termed when he soil is excavated). When an excavation has been approved as a quarry, the CO shall indicate the appropriate quarrying gradients, in contrary to the markings in the plan.

The bottom of trenches and pits below foundations shall be leveled to the required levels and inclines by means of a layer of lean concrete whose average thickness shall not exceed 5.0

cm. The bottom of the trenches excavated for pipes, etc., shall be leveled with a layer of course gravel or aggregates (at an average thickness of 5.0 cm.) compacted as specified in paragraph 0104, unless another requirement has been noted in the plans or in one of the other contract documents, or if the CO has so required.

01031 - Blasting

The use of explosives requires the written consent of the CO. The contractor shall obtain all the licenses and permits required for blasting operations.

The blasts shall be confined to the planned volumes, and no extra blasting shall be permitted.

Loose rocks, or those whose stability has been lessened following the blast, shall be removed from the site.

01032 - Filling with Quarried Material

The earth for filling may contain a quantity of stones from the quarrying, as long as the maximum stone size shall not exceed 2/3 of the thickness of the fill layers, and in no case shall be larger than 14 cm. The stones shall beintermixed with fine material , in such as a way as to prevent the formation of voids in the fill layers. Larger stones than stated above, shall be crushed before being transferred to the fill.

The ridge of the excavation slope shall be rounded, and all stones rolling down or loosely held

- shall be removed.

The quarried material fill shall be compacted as required.

0104 - Compaction and Tamping

01040 - General

A distinction shall be made between controlled compaction and regular compaction. Regular compaction shall be carried out on layers of quarried material, which cannot be tested under controlled compaction. The excavation’s subgrade (the final level after the earthworks have been completed), the fills and any other area marked in the plans or in any of the other contractual documents, shall be compacted with appropriate mechanical equipment, at the level of wetting required in order to attain the required level of density. The moisture content shall be in the range of 2% from the optimum moisture content.

A. The compaction shall be carried out by means of various types of mechanical rollers, after the soil has acquired the required moisture content (through the addition of water or by drying). The rollers shall be pneumatic, vibrational, lamb's feet, etc.

B. In those places where the various types of mechanical equipment cannot be applied, the compaction shall be carried out with special equipment such as frog clamps and the like.

C. Unless otherwise specified , the compaction shall be carried out in layers no thicker than 20 cm. (after compaction).

Solicitation W912GB-16-R-0030

Before compaction of each layer, it must be leveled to the supervisor's satisfaction. The finish of the upper layer compaction shall be within the allowed deviation limits.

D. The compaction work includes preservation of the finished layer surface and its edges, at the appropriate density and humidity and at the proper height until it is spread and compacted onto the next and proximate layer. The preservation of the layer surface also means repeated wetting and compaction if required to this end.

01041 - Tamping of Areas

Tamping of the subgrade surface inside the excavation or tamping of the existing soil surface or the soil after stripping - shall be carried out by ploughing and raking, wetting and tamping the soil, until a 20 cm. thick layer is obtained, compacted to the required level of density.

Unless otherwise specified, in those places where the thickness of the fill is less than 20 cm.

(after compaction) the contractor shall plough the natural soil surface to such a depth that after the distribution of the fill layer, its mingling with the plowed soil surface and its compaction, the obtained layer shall be 20 cm. thick.

01042 - Density

Unless otherwise specified, the range of density allowed at the site shall be as follows;

Controlled tamping

Type of soil according to the

AASHO classification method

Depth of layer below the subgrade surface

Minimum tamping rate

A-3 (maximum 5% passing mesh 200)

At any depth 98%

A-1 * , A-2-4, A-3 (More than

5% passing mesh 200

At any depth 95%

A-2-5,A-2-6,A-2-7,A-4,A-5 Less than 100 cm 95%

A-2-5,A-2-6,A-2-7,A-4,A-5 More than 100 cm 93%

A-6 to A-7-6(5) At any depth 93%

A-7-6(5)** At any depth 90%

* The compaction rate required for an A-1 type subgrade is at least 98%.

** In swelling clays, the CO is entitled to demand a different compaction rate (for example 89

2%).

Regular compaction

The compaction of each of the layers of fill in quarried material which in the opinion of the

CO, because it contains large stones, the extent of its compaction cannot be measured by means of a density test - shall be carried out by means of a vibration roller with a minimum force of 15 tons/blow and the number of vibrations per minute shall be no less than 1000.

The compaction shall be carried out along the entire width of the layer, until the sinking of the soil or its movement under the rollshall stop, and each point has been covered with a minimum of 8 roller passes - where the thickness of the layer is up to 30 cm, or double the number of passes when the layer thickness is more than 30 cm (up to 60 cm).

The contractor is entitled to suggest compaction with a vibration roller with a greater minimum force (more than 18 tons/blow), the minimum number of passes in this case shall be decided by the CO following the compaction of a trial patch.

Solicitation W912GB-16-R-0030

If in the course of compaction, it becomes evident that in some places the rate of compaction can be tested to the entire depth of the layer, the CO is entitled to demand the compaction rate required for the controlled compaction.

01043 - Compaction Overlap

In all types of compaction, the compaction overlap in a mechanical or vibrational roller, at least half the width of the back wheel, and in a pneumatic roller, half the width of the back axle.

01044 - Collection and Testing of Samples

In order to determine the quality of compaction, samples shall be taken for determining the field density. The samples shall be taken as follows:

Six samples for each lot of work 2,000 sqm in size or less.

The lot of work is the area, which the contractor has managed to compact on a given day, the material and processing properties of which are uniform. The CO is entitled to change the definition of work lot for the same number of samples, according to the working conditions, at his sole discretion.

The change instruction shall be given in writing in advance. The samples shall be taken along random points.

The average of the above tests shall be smaller than the required density. The test results of

1/6 of the tests may reach a lower limit smaller by two than the required level of density. For example: If the required density rate is 95%, the average of the six- (6) samples must be 95%, but no more than one shall reach the low limit of 93%.

In weak spots, such as above and aqueduct, or in places where a crater or swamp is to be, etc., samples shall not be taken according to the above working lot, but according to the CO instructions.

In the event that the area has failed to conform to the above requirements, the entire working lot shall be considered defective, and the entire area shall have to be reworked, after which repeated tests shall be conducted on the entire working lot.

01045 - Permitted Deviations

The contractor must work the areas as detailed in the appropriate sections dealing with excavation, and those dealing with fill, within the following limits of precision:

The allowed deviation from the planned height shall not exceed:

-40 mm (minus 40) - in surface excavation and fill.

(-)+50 mm., - in the excavation of trenches and borrowing areas.

0105 - Wrapping and Bedding

01051 - Wrapping

Wrapping around pipes, control cells, foundations, walls etc., submerged in clay soils, shall be made of sand, gravel-sand, or other granular soil authorized to this end, all according to the specific case, as required in the plans or in one of the other contractual documents. The wrapping material shall be clean of clay, silt and damaging materials and free of stones.

Detailed instructions regarding the method of execution shall be given in the particular

01052 - Sand Bedding

Sand bedding below concrete surfaces, floor tiles or foundations shall be applied at the thickness marked in the plans or according to the CO instructions. The sand shall be taken

Solicitation W912GB-16-R-0030 from an authorized source and shall be course sand, free of all stones, clay, silt, organic materials or any other damaging materials.

The sand must be spread in layers whose thickness does not exceed 20 cm., and compacted as detailed in paragraph 0104. The layers shall be spread in parallel with the final surface of the cast or tiled area, and the bedding surface shall be shaped according to the required levels and gradients. Bedding made of another material shall be carried out according to the particular

01053 - Buffering and Blasting Layer

Should one of the contractual documents require buffering, layers or blasting layers, these shall be carried out according to the instructions of the Rear Command Headquarters.

Solicitation W912GB-16-R-0030

GENERAL SPECIFICATION

CAST IN-SITU CONCRETE

WORKS

Table of Contents

0200 - General 0201 - Concrete Materials 0202 – Types and Properties of Concrete

0203 - Manufacturing the Concrete 0204 - Casting the Concrete 0205 - Finishing and Curing of Concrete 0206 – Formworks 0207 - Reinforcement Steel 0208 - Exposed Concrete 0209 - Quality Assurance

0200 - General

02001 - Scope

This chapter deals with the quality of the materials and workmanship of concrete and reinforced concrete works, performed in accordance with the plans and according to the instructions, and shall apply to all parts of the building, underground and above, for the whole site at any given depth or height. The specifications apply for ready mixed concrete and concrete mixed on site.

Self leveling concrete shall be performed according to a specific specification.

The requirements for splashed concrete (including concrete reinforced with steel rods , see chapter 54 – underground digging).

02002 – Standards

Following is a list of the main standards concerning this chapter.

Israel Standards:

No. Name

1 Portland Cement

3 Aggregates from natural sources

12 Hollowed blocks for ribbed ceilings

Part 1

Part 2

Part 3

Part 4

Part 5

Part 6

Part 7

Preparation of concrete specimens and testing them

Sampling fresh concrete

Properties of fresh concrete

Making the specimens ready and curing

Properties of hardened concrete – strength

Testing methods: Properties of hardened concrete –except strength

Sampling, preparing and testing of concrete specimens hardened on site

Nondestructive tests of hardened concrete

37 Part 1 Plywood – regular

118 Concrete strength

Part 1

Part 2

Part 3

Part 4

Part 5

Concrete regulations

General principles

Reinforced and non-reinforced concrete structures

Pre-stressed concrete

Pre-cast concrete elements and structures

Pre-cast pre-stressed hollow core slab floors

580 All Parts Welded steel nets for concrete reinforcement

Solicitation W912GB-16-R-0030

No. Name

601 Ready-mixed concrete

739 Steel rods with improved adhesive capabilities for concrete reinforcement

789 Building tolerances: principles (part 1)

893 Smooth rolled steel bars for concrete reinforcement

896 Chemical concrete additives

904 Form-works for concrete

Part 1 Principals

Part 2 Telescopic supporters

1209 Coal fly ash for concrete

1378 Pile foundation in rock with hammer drilling

1476 Part 1 – Impermeability testing of the building: flat roofs and balconies

Israel Standards Institute document Standard 12 – Ready mixed concrete plants: QA systems: requirements.

Standard15 – Ready mixed concrete plants: authorization procedure.

Foreign standards ASTM – C – 171 Sheet Materials for Curing Concrete.

ASTM – C – 309 Liquid Membrane – Forming Compounds For Curing Concrete ASTM – c – 387 Standard Specification for Packaged, Dry Combined Materials for

Mortar and Concrete DIN 18541 – Thermoplastic Sealing Strips for Sealing Joints in In-Situ Concrete

02003 – Israel Standard Institute documents

Israel Standard Institute Specification 176 – steel rods and nets for concrete reinforcement, cut and bent.

02004 - Other Chapters

All the said in those chapters about the general specifications of building work, applies also to this chapter.

Chapter 04 – Construction work

Chapter 08 – Electric facilities

Chapter 50 – Concrete surfaces

0201 - Concrete materials

02011 – Cement

020111 – Type and Quality of Cement

The cement shall meet the requirements of IS 1 according to the stated type. In case of no other specifications the cement shall be of the Portland Cement 250 type.

White cement shall meet at least the mechanical requirements for Portland Cement 300 type .

For concrete of B-50 and above the cement used shall be of the Portland Cement 300 type or stronger.

020112 – Supply

The cement shall be supplied packaged by the manufacturer or in bulks. The supply of bulks shall be done in an appropriate container in accordance with the requirements of the authorities.

Cement supplied in bulks shall be stored in silos with a hermetic closure. It shall not be allowed to be stored in open containers or crates.

Cement supplied in sacks shall be store on the site for the shortest duration possible and the contractor shall make sure it shall not get wet. Cement containing small lumps, not easily crumbled with the fingers shall not be used, unless tested by the lab and approved. Spilled cement that was gathered shall not be used.

Cement stored for 3 month or more, even if stored as specified, shall not be used, unless approved by the lab after the appropriate tests.

02012 - Aggregates

020120 - General

All the aggregates shall be of natural sources and shall meet the requirements of IS 3.

At the beginning of construction, the contractor shall proclaim the source of the aggregates he chooses for the work.

Aggregates of the B type, according to IS 3, shall not be used for concrete of B-40 or better or exposed concrete, unless it was approved by certified lab for stated use.

020121 - Coarse Aggregates

The coarse aggregates shall be grounded to cubes (if possible).

The size shall not be more than one of the following:

A. 1/5 of the minimal size of the form-works.

1/3 of the thickness of the hardened slabs.

¾ of the distance between every reinforcement rods, wires or strand or tensioning cables in the pre-stressed concrete.

25 mm, unless otherwise required in a specific specification.

If not otherwise required, the coarse aggregate shall fit the above mentioned sizes. It shall be on a single grain or multiple grains and shall be chosen according to the grading in the IS 3 for coarse aggregate.

In cases, with prior approval of the CO, it shall be permitted not to comply with those specifications, if the methods of spreading and vibrating are such as to permit the use of a cruder aggregate

Solicitation W912GB-16-R-0030 without the danger of defects such as gravel pockets, hollows etc.

020122 - Fine Aggregates

Fine aggregates shall be of natural sources (such as seashore sand, riverbank sands or natural excavations) or grind sands or both.

The aggregates shall comply with the IS 3 for fine aggregates.

Ground sands shall be washed.

02013 - Water

The water for the mixture and for curing shall be of drinking quality and shall be derived from the drinking pipelines.

Other water shall be tested by a qualified lab and approved for the use in concrete or in the curing process, not having bad effects on the quality of the concrete or the reinforced concrete.

02014 – Additives

If not otherwise said, the contractor may add chemical additives , complying with the demands of IS 896, or minerals as coal fly ash to change the properties of fresh or hard concrete.

Coal fly ash as a substitute for part of the cement or the sand shall meet the requirements of IS 1209. Coal fly ash shall be supplied, stored and put into the mixer in accordance with the cement standards as said above.

The delivery shall be performed according to the regulations of the authorities.

The use of additives of the microsilika type shall be permitted if so required in a special specification.

Addition of the Superplasticizer shall conform to the IS 896, according to the type.

The additives shall be approved if qualified by an authorized lab that it conforms to the qualifications demanded in the standard, and their effects on other properties of the concrete were taken into account. The amount of the additives shall be determined by tests done prior to commence of the structure, taking in account the casting conditions, and the expected climate when casting. The additives shall be supplied in the manufacturer’s packaging, in accordance with the IS 896, and shall be stored on the site according to the manufacturer’s instructions. It shall be put into the mixer in a method ensuring it’s exact amount and distribution in the mixture.

The use of air confining additives shall be permitted only if the concrete is prepared in gconditions and under supervision according to IS 118 and when there is a constant supervision on the amount of air confined as derived from the primary tests on the site. Air confining additives shall not be used in concrete containing coal fly ash .

If using more than one additive , primary tests shall be performed in certified lab to confirm the compatibility between the additives .

If it is said in the plans or the contract documents that the contractor shall use any kind of admixtures to change certain

Solicitation W912GB-16-R-0030 properties of the concrete, the additive shall comply to all the above requirements .

0202 – Types and properties of Concrete

02020 – General

The types of concrete shall be defined according to the concrete properties as demanded in the special specification:

A. The typical strength according to IS 118.

B. The maximum grain size of the coarse aggregate.

C. The consistency.

D. Control conditions

E. Special requirements

02021 – Cement Quantity

The cement quantity shall be determined according to primary performed tests.

The minimal amount of cement in reinforced concrete shall be according to IS 466.

Unless otherwise stated in a special specification, the maximum amount of cement for B-50 concrete shall be no more than 480 kg and for B-60 concrete – 500 kg.

02022 – Consistency

The consistency shall be according to the grade in IS 26 part 2.

The grading of slump for the concrete, white casting into form-works, shall exceed the grade while shipment to the site, for casting and vibrating.

02023 - Control Conditions

The control conditions shall comply to the IS 118.

Concrete of B-30 quality or better shall be manufactured under good conditions.

Concrete of B-50, B-60 or higher strength shall be manufactured under close lab supervision.

0203 - Manufacturing The Concrete

02030 – General

The following paragraphs are the requirements for manufacturing:

A. Ready mixed concrete (manufactured in a plant).

Concrete mixed in-setu.

The more common type shall be ready mixed concrete.

02031 – Ready mixed concrete

A. The Plant

Solicitation W912GB-16-R-0030

The plant where the concrete is brought, shall be certified for mixing concrete under good supervision condition according to the IS 601.

The contractor shall be responsible for the quality of the concrete.

B. Distance of The Plant From the Site Unless otherwise stated in a special specification, the interval time between pouring the mixture into the mixer in the plant and its cast at the site shall not exceed 1.5 hours.

According to that requirement the concrete shall be ordered from a plant complying with this time limit.

C. Shipment Certificate Every shipment shall have a certificate noting at least the followings:

1) Type of concrete according to its strength (according to IS 118).

2) The concrete fitness to the service conditions – pumping concrete, exposed concrete (see paragraph 0208) etc.

3) The nominal maximum size of the coarse aggregate.

4) Slump grading.

5) The minimal amount of cement.

6) The maximum amount of cement, if required by a special specification.

7) The maximum amount of water in the mixture, if required by a special specification.

8) Time of adding the water to the mixture.

9) Types of chemical or mineral additives (if added ).

10) The maximum water amount permitted to add in the site.

D. Means of Maintaining the Concrete Slump on Site.

In order to get the right grade of slump, as ordered, it is not permitted to add water to the mixture on the site, but the amount approved in writing by the QA CO of the plant, and written on the certificate. Mixture, thickened to a degree that the permitted allotted amount of water to be added can not bring it back to the right thickness, shall be disqualified and shall not be used. In special cases, according to a qualified lab concession, even if the concrete has thickened as said above, it will be used. The condition is that it can be stirred when it is brought to the site, and a set amount of super-plasticizer admixturecan be added, and that it shall be mixed for at least 10 minutes – on the responsibility of the contractor. Concrete that started to hardened – small lumps started to form – shall not used at any event.

E. Organizing the site The site has to be organized to be able to receive constant flow of incoming trucks loaded with concrete as required. The site shall be organized in a way allowing a quick movement of the trucks to and from the casting site. In order to prevent from the concrete to separate to components, there shall be no need to re-grade the slump for the preplanned means of delivery of the concrete in the site. (For example troughs with too small slope and no outlet).

F. Concrete Supplied By Mixers The concrete shall not be brought by self…