A        Playing field works

A.A    Supply and installation of turf Wicket area

B.B    Supply and installation of agricultural drainage lines Drainage filter material.
          Toxic waste filter to drainage lines, soil and turf to the playing field.

C.C    Supply and installation of automatic irrigation system to the playing field.                              

D.D    Maintenance of playing field to hand over and acceptance by the proprietor
.
E.E    Schedule of rates

A.A     Turf Wicket Construction and Maintenance.

1.0 Site Layout.

The center of the playing field shall be the center of the Wicket area. The position is to be determined by the placement of the survey peg with indication of RL above the playing field edge. The position is to be indicated on all as position X.

The four corners of the Wicket area shall be determined as being 15 meters at right angles to the center line which is to be one degree from true North. Meaning that the finished Wicket area has the dimensions of 30 meters in width and 24 meters in length.

The survey positions are to be indicated using a tile or brick buried at a depth of 100 mm below the finished RL and indicated on all future drawings as positions A, B, C and D.

The minimum gradient from any or all of these positions to the field edge shall be 1:100 or one degree.

The minimum distance from A,B,C, or D to the field edge shall be ideally 65 meters.

The edge of the field shall be circular in shape where practical, with a minimum ideal radius of 70 meters from position X for the staging of International fixtures.

1.2 Site Preparation.

All soil or material bounded internally by points A,B,C,D shall be excavated and removed from the field.

The excavation shall be to a depth of 350mm with vertical sides free of loose materials.

The sub-base shall be compacted with a center ridge-North to South-no greater than 100 mm above the sub-base edge.

A trench shall be excavated around the sub base edge 100 mm x 100 mm for inclusion of drainage materials. At the lowest point the trench shall be redirected toward the outfield drainage system.

All trenches shall be filled to a depth of 50 mm using 10-12mm washed blue metal or other suitable drainage material.

100 mm slotted PVC agricultural drainage pipe shall be placed in the trenches in a continuous pattern with an outlet at the lowest point to the playing field drainage system.

100 mm of 10 mm washed blue metal or other suitable drainage material shall cover the sub base and the compacted with a maximum weight of 1 ton roller.

1.3 Soil Profile Placement

A depth of 50 mm of washed medium course reverse and shall be evenly spread over the washed blue metal and compacted.

Sieved 12 mm clay Wicket soil to a depth of 50 mm shall be evenly spread over the washed river sand with a maximum weight of 200 kg roller. Rolling shall be on both an East to West direction and north to south.

Straight, timber edging of 100 mm x 50 mm, shall be placed at the edges of the excavation. All timber shall be level.

Dividing timber of 100mm x 50mm, at 2.8m spacing, shall be placed north to south. All timber dividers shall be level with edging timber.

Sieved 6mm clay wicket soil to a depth no greater than 25mm shall be evenly spread and compacted with a maximum weight of 200kg smooth-drum roller.

This process is to be repeated until the total depth of 175mm of clay wicket soil has been achieved. Rolling shall occur between each placement of soil.

The final layer of clay wicket soil is expected to be approximately 25mm above the finished RL.

On completion of soil compaction, the area shall be irrigated heavily for approximately 36 hours to displace the maximum amount of air remaining in the profile.

No access shall be allowed to the wicket area after irrigation until the soil has sufficiently dried.

1.4 Turf Delivery and Installation

The turfgrass shall be cultivated Cynodon spp. weed and disease free.

There shall be sufficient turf or stolons to cover approximately 750 square metres.

Turf shall consist of a firm satisfactory mat of stolons, rhizomes and roots cut to a minimum thickness of 15mm.

For International requirements the turf may be stolons transported in damp hessian bags, maintained at an ambient temperature of less than 10 degrees centigrade from harvesting to placement on site.

The turfgrass shall arrive on site in a healthy green condition and shall be installed within 36 hours of harvesting and within 24 hours of delivery to the site.

Should the turf or stolons be imported, the Playing Field Contractor shall ensure that all reasonable steps, including airfreight, palletizing, refrigeration, loading, unloading, are taken so that the conditions for site delivery are abided where practicable.

Selected turfgrass shall be washed free of all foreign materials and soil.

The turf shall be rolled in lengths no greater than 4m and shall not exceed 1m in width.

The turf shall be rolled out on the clay wicket soil area close butted and compacted with a maximum weight no greater than 100kg smooth drum roller so that the stolons have been depressed into the clay wicket soil.

All turf not in excellent condition shall be removed and replaced.

The turf shall be irrigated for no less than 24 hours after compaction has been completed.

1.5 Turf Establishment

Newly installed turf shall be initially cut approximately 10 days following establishment at a height not exceeding 10mm nor less than 5mm.

The turf shall be scarified when the surface is in a dry condition and has been cut. Depth of scarifying is to be not greater than 5mm

The entire turf area shall be vacuumed free of all loose organic matter following scarification, cut and top-dressed with finely sieved (less than 5mm) clay wicket soil. The area is to be leveled to plus or minus 2mm tolerances and irrigated.

Soil chemical analysis samples are to be taken for evaluation from which recommendations will provide suitable fertilizing measures to be taken at this time.

At approximately 21 days from initial turf installation, the area is to be rolled from east to west on a minimum 3 separate occasions with a maximum weight of 1 tonne smooth drum roller, moving laterally no greater than 200mm on each pass for the width of the area.

Initial wicket preparation shall not take place less than six (6) weeks after the turf installation.

General Guide for Turf Wicket Construction

Firstly, it assumed that the contractor has arranged for a soil analysis test in order to determine the suitability of the soil selected for the task.

For a wicket area of approximately 900 square metres a minimum of 100 cubic metres of soil is required. The soil is to be dry and crushed so that no ped is larger than 5mm in diameter.

The prepared turf wicket has a dimension of 10 feet in width and 80 feet in length for construction purposes. An area for 8 wickets is 80 ft x 80ft, an area for 4 wickets is 40ft x 80ft. All wickets are aligned 1 degree from true north.

Having determined the location of the area, establish corner pegs so that they are at least 1ft high and level with each other. Join all pegs with a string line and mark lines on the ground from one peg to another. Place pegs at all halfway points.

By use of a level, lower pegs at one end so that achieve a 1:100 or 1 percent gradient over the length of the area. This will give surface drainage to the completed wicket area.

Using a tracked excavator or back-hoe, excavate inside the pegs to a depth of approximately 18". Should the base of the excavation be of a clay material, compact with a suitable machine.

Ridge the centre so that the sub-base has a fall from the centre to the east and west sides of approximately 1:80 If the outfield drainage is poor, trenches will be required surrounding the perimeter of the excavation and out into the outfield to a suitable drainage outlet. The trenches are approximately 6" x 6" to allow for 6" slotted PVC agricultural drainage pipe to be laid. These will remove sub-surface water away from the wicket area.

The trenches are back-filled using 12mm washed crushed aggregate, free of all fines. Should the outfield be of a sandy soil, it is possible to disregard the need for sub-surface piping.

The excavation is then filled with 12mm washed aggregate, free of fines, to approximately 2" above the centre ridge-line and compacted. A geotextile material, Bidum, covers the aggregate layer.

Place approximately 3" of coarse, washed river sand over the material and compact. Ensure that the sand has an even 1:100 fall north to south, or whichever direction is selected for water to move from the area.

Using 4" x 2" straight timber, place the timber rails around the edge of he excavation and at 10ft intervals across the area from north to south. It is important that these rails have a fall of 1:100 north to south and that they are level with each other.

Using dry, crushed clay wicket soil, spread no more than 2" of soil in each of the 10ft wide strips and roll each one with a smooth hand roller of approximately 200kg for at least 1 hour each. The process is repeated for each strip until the final layer is installed and rolled . The final layer is approximately 2" above the finishing timber rails. A 1 tonne roller is used for approximately one hour on the finished level.

Irrigate the entire area for approximately 2 days. Allow the area to dry and when sufficiently dry, roll for approximately one half hour with a 1 tonne smooth drum roller. Irrigate again for approximately 8 hours.

In warm season climate , Cynodon dactylon or one of the Cynodon species is the preferred turfgrass. Lay out the mat of turf or stolons over the damp clay wicket soil and roll with a 100kg smooth drum roller so as to depress the stolons into the soil surface. Irrigate until surface water is obvious. Allow the surface to dry and repeat the rolling procedure. Irrigate again so that all soil is removed from the leaf surface of the turfgrass.

When dry enough the area is then leveled using finely crushed and sieved clay wicket soil. Soil chemical analysis is carried out to determine the required fertilizers.

from time to time the area may require re-leveling as the soil "settles" from the rolling and irrigation. Irrigation should be once twice per week to promote quick root establishment.

Approximately 6 weeks following soil and turf establishment, the timber leveling rails may be carefully removed, and the trenches formed by them, fill with fine clay wicket soil to level.

At 6 to 8 weeks the area may be rolled using a 1 tonne smooth drum roller for approximately 5 to 10 minutes per strip per week. From 10 to 12 weeks after establishment, rolling can be increased to 20 minutes per strip per week.

The wicket area should be available for normal preparation and play from the 12th week onwards, depending on climatic conditions in the area.

It can be expected that the individual wickets may offer variable bounce in the first season of use, however it will become predictable as the initial settling occurs.

The life expectancy of a well constructed turf wicket is approximately 40 to 70 years.

Costs for such construction may vary from country to country. And will depend on the availability of materials and labour for each project. As an indication of the cost, given that all materials, labour and equipment are costed, would be approximately $2000 per wicket.