oval pit holes (only one of which is used at a time) and for the easy use and cleaning of the booths. The floor of the booths will be reinforced concrete. The superstructure will be brick masonry which is durable and presentable. The roof will comprise long aluminium sheets. The lids for the opening of the pits will be removable precast concrete plates with handles. In front of the doors, a brick wall will be constructed for blinding purposes. While the UBE design extends the roof to this blinding wall, only the booths will be roofed under the Project. The custom of removing solids from pit latrines does not appear to exist in general. It will, therefore, be necessary to obtain the understanding of people concerned in school on the need to maintain clean toilet facilities and to remove solids when the pits are full in view of the use of the newly constructed toilets for a long period of time. Even though the arrangement of the booths in a single row in one building is economical and easy to construct, separate buildings for boys and girls will be constructed under the Project when the number of booths exceeds eight. Considering the local customs, no urinals for boys will be installed. Plan Cross-Section Aluminium Roofing RC Beam Ventilation Pipe Steel Door Brick Wall Booth 1,300 (650 x & Screen 2,000) Brick Wall Precast 2,500 Concrete Slab Boys Girls 1,200 1,400 Concrete Pit Block 650 1,3001,300 1,300 1,300 650 5,200 2 2 6.76 m (one booth: 1.69 m ) Fig. 2-2-4 Standard Design Drawings for Toilet Building (Case of Two Booths for Boys and Two Booths for Girls) – 33 – Number Single Building Serving Both Boys and Girls Separate Buildings Serving Boys and Girls of Booths (with Partition Walls) 2 TW2 (3.38 ㎡) 4 TW4 (6.76 ㎡) 5 TS5 (8.45 ㎡) 6 TW6 TS6 (10.14 ㎡) (10.14 ㎡) 7 TS7 (11.83 ㎡) 8 TW8 TS8 (13.52 ㎡) (13.52 ㎡) Fig. 2-2-5 Different Types of Toilet Buildings – 34 – 6) Outline of School Furniture and Fixtures to be Procured c Blackboards Each classroom will be equipped with a blackboard (5.0 m x 1.2 m) d Pupils Desks-Benches Twenty-three sets of two seater integral desk-benches 65cm 110cm which are commonly used in primary schools in Nigeria 75cm will be provided (to seat 46 pupils) and placed parallel to the blackboard. 7) Scale of New Facilities and Furniture The calculation results for the scale of the new facilities and quantity of furniture are shown in Table 2-2-11. Table 2-2-11 Scale of New Facilities and Quantity of Furniture Item Niger Plateau Kaduna Total Target Schools Number of Schools 12 26 32 70 Classroom 78 147 265 490 Headmaster’s Office and Store Room (units) 5 4 4 13 Number of Number of Toilet Booths 68 144 170 382 Facilities Booths for Boys (34) (72) (85) (191) Booths for Girls (34) (72) (85) (191) Classroom (m2) 4,368 8,232 14,840 27,440 Headmaster’s Office and Store Room (m2) 140 112 112 364 Floor Area Side Corridor (m2) 1,288 2,384 4,272 7,944 Toilets (m2) 115 243 287 646 Total Floor Area (m2) 5,911 10,971 19,511 36,394 Furniture/ Integral Desk-Bench (Two Seater) (sets) 1,794 3,381 6,095 11,270 Fixtures Blackboard 78 147 265 490 Deep Well Deep Well with Hand Pump 4 10 5 19 – 35 – 2.2.2.4 Water Supply Facility Plan (1) Deep Well Design The planned deep well depth is 60 – 80 m for Hydrogeological Group 2 (Tertiary basalt), 50 – 60 m for Group 3 (Cretaceous sandstone), 20 – 60 m for Group 5 (gneiss and granite) and 60 – 80 m for Group 6 (schist) with favourable conditions. The average deep well depth will be 60 m. The deep well diameter will be 100 mm to allow the installation of a hand pump for the deep well. As the groundwater at the project sites is often acidic, the casing and screen will be made of PVC to resist corrosion. A minimum of 6 m of grout sealing will be applied to prevent contamination due to infiltrated surface water. Fig. 2-2-6 shows the standard type of the planned deep well. (2) Design of Auxiliary Facilities At the top of the deep well, a concrete slab of 20 cm in thickness will be placed to prevent the infiltration of foul water. Spilt water will be guided via a 4 m long drainage ditch to the planted area of an infiltration pit at the end of the ditch. This planted area will be created by the PTA or local community as part of the arrangements to establish a body responsible for the maintenance of the deep well after its completion. Fig. 2-2-7 outlines the auxiliary facilities. The outline of the Study schools and the selection process, the outline of the facilities to be introduced at the target schools and the list of facilities to be introduced are shown in Table 2-2-12, Table 2-2-13 and Table 2-2-14 respectively. – 36 – GL Approx.約6m (φ300mm) 6 m ( 300 mm) ∅ 0.3m Groutグラウド to prevent sanitary 汚水浸透防止用water 0.2m Approx.約20m (φ200mm) 20 m (∅ 200 mm) 掘削土による充填Refilling using excavated soil PVCｹｰｼﾝｸﾞ､φ100mmPVC casing ∅ 100 mm Total50～60m well depth: 50 – 60 m 井戸の全長 0.1m Approx. 10 m screen 約10m PVCｽｸﾘｰﾝ､φ100mmPVC screen ∅ 100 mm スクリーン部 Gravel礫充填 Pack GRAVEL PACK Fig. 2-2-6 Structural Drawing of Deep Well – 37 – 「ナ」国施工範囲Scope of work by Nigerian side 1800 4000 浸透ピットInfiltration pit 植栽Planting 排水溝Drainage ditch コンクリートブロック製Concrete blocks 3600 A' 300 A 1800 コンクリート製水叩きConcrete apron < Plan平面図 > Unit:(単位mm) mm Hand pump深井戸用ハンドポンプ for deep well 50 700 1100 3950 1800 1800 A-A’A-A' cross-section 断面図 Unit:(単位mm) mm 「ナ」国施工範囲Scope of work by Nigerian side Fig. 2-2-7 Auxiliary Facilities for Deep Wells – 38 – Table 2-2-12 Outline of the Study Schools and Screening of Project Schools Table 2-2-12 - 1: Niger State Present Condition Calculation of Number of Classrooms Evaluation (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14) (15) (16) (17) (18) (19) (20) (21) (22) (23) (24) (25) (26) (27) irregularity.) irregularity.) * Number of Classrooms Requested Requested of Classrooms Number originally Access Transport Ownership Land Site Size Topography Donor Other with Overlapping Security Shortage in of Classrooms Number 3) than (less of Local Participation/Cooperation Community School Size above Maximum (1,440 pupils) Assistance Project School for Serial No. Study School No. Project SchoolNo. School Name LGA of Pupils Number of Classes Number of Stream Number Indicates (‘#’ System Two-Shift Classes Combined of Pupils/45 Number Teachers of Number Ratio Teacher-Pupil (1) / (7) of Classes Number Desirable Surplus/Shortage in the future Teacher (- means a shortage) (7) - (9) Number of Usable Classrooms in the future iii) ii + + (i Usable of Currently Number (i) Classrooms Number of Classrooms Under (ii) Construction with Classrooms Usable of Number (iii) Repair Number ofUnusable Classrooms Shortage in of Classrooms Number (9)-(11) 1 N1 Barkin Sale Minna 1,737 30 # 1 1 39 38 46 39 -1 6 6 0 0 0 33 20 x 2 N2 NG-9 Korokpa Paikolo 450 15 # 0 1 10 20 23 9 11 4 3 1 0 0 5 4 ＊ 3 N3 NG-11 Rafin Kuka Shiroro 256 8 # 0 1 6 23 11 6 17 2 2 0 0 2 4 6 ＊ 4 N4 Chukuba Shiroro 65 4 # 0 0 1 4 16 0 4 6 6 0 0 2 -6 6 x x –39– 5 N5 NG-12 Bakin Iku Suleja 738 9 # 1 0 16 16 46 15 1 9 6 3 0 0 6 28 ＊ 6 N6 Wushishi Model Wushishi 1,575 17 # 1 1 35 38 41 36 2 6 4 2 0 0 30 13 x 7 N7 Ibrahim Teko Bida 1,526 24 # 1 0 34 67 23 33 34 27 18 3 6 0 6 12 x 8 N8 NG-8 Central Sarkipawa Murya 759 16 # 1 1 17 20 38 18 2 11 8 3 0 0 7 17 ＊ 9 N9 Rafin Karma K/Gora 197 7 # 1 0 4 5 39 3 2 2 0 2 0 0 1 4 x 10 N10 Gbara Mokwa 284 6 1 0 0 6 17 17 6 11 3 3 0 0 1 3 2 x 11 N11 NG-10 Rafin Mota Rijau 541 15 # 0 1 12 20 27 12 8 6 6 0 0 0 6 7 ＊ 12 N12 NG-1 Etsu Nuhu Agaie 450 5 # 0 0 10 28 16 9 19 6 6 0 0 0 3 12 ＊ 13 N13 NG-4 Makafu UBE Prim. Sch Gbako 202 6 # 0 0 4 10 20 3 7 0 0 0 0 0 3 4 ＊ 14 N14 NG-3 Sangi Edati 266 7 # 0 0 6 29 9 6 23 2 1 1 0 0 4 9 ＊ 15 N15 NG-2 Tudunfulani Gabas Bosso 212 5 # 0 0 5 10 21 6 4 0 0 0 0 0 6 4 ＊ 16 N16 Karaya Nom. Rafi 227 6 1 0 0 5 6 38 6 0 6 1 3 2 0 0 4 x 17 N17 NG-6 Salka Cent. Magama 1,403 33 # 0 1 31 29 48 30 -1 13 13 0 0 0 17 10 ＊ 18 N18 Central P. S.