1 / 25

Quantity Take Off

Quantity Take Off. Applied Science University. Dr. Ayman A. Abu Hammad. Topical Overview. Chapter 1: Site Preparation Chapter 2: Soil and Site Exploration Chapter 3: Excavation Chapter 4: Foundations Work Chapter 5: Wood Formwork Chapter 6: Steel Rebar Chapter 7: Concrete

lorant
Télécharger la présentation

Quantity Take Off

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Quantity Take Off Applied Science University Dr. Ayman A. Abu Hammad

  2. Topical Overview • Chapter 1: Site Preparation • Chapter 2: Soil and Site Exploration • Chapter 3: Excavation • Chapter 4: Foundations Work • Chapter 5: Wood Formwork • Chapter 6: Steel Rebar • Chapter 7: Concrete • Chapter 8: Building structures • Chapter 9: Walls Construction • Chapter 10: Brick Works • Chapter 11: Masonry (Stone) • Chapter 12: Stair Wells

  3. Letter of intent Foundations rebar fabrication Mobilization: Site offices Off. furniture Computer, phone, Workers residence Cement-agg.-rebar Sto. Tools & equip. Security fence Planning: Schedule Project team Subcontractors Suppliers Submittals workforce Site electricity, access roads, phone line, water, heat Cars Notice to proceed Civil Works RC foundations forms- rebar Foundations RC cast Foundations center lines Blinding forms- cast Excavation: 1- Bulk Exc. 2- Trimming Found. Wall forms- rebar 2-3-4… Found. wall cast Floor X Columns forms- rebar Compacted backfill Finishing Side walks Masonry Partition walls- block work Floor on grade: rebar- cast Dismantle slab 1 forms Retaining Walls, fence Slab # 1 forms- rebar Slab # 1 cast Cast column & walls 2- Weeks E&M rough RC walls: forms-rebar cast Plaster Tile Doors-wind. Paint

  4. Rebar Take-off Rules • Steel diameters are: • 8, 10, 12, 14, 16, 18mm…. • Rebar Standard Lengths are: • 4, 5, 6, 7, 12m. • Overlap standard distance is= 40*max Diameter for tension, 50*max Diameter for compression. • Cover distance = 0.005m in foundations only and 0.025m otherwise. • Stirrup key is 0.1 *2= 0.2m • Rebar order format is as follows: • Calculated Number Ø Standard Diameter/ Standard Length • Rebar volume is negligible in concrete quantity take-off. • AGGREGATE REBAR DATA FOR SIMILAR DIAMETERS AND LENGTHS ONLY! • FOR TONNAGE ESTIMATION MULTIPLY THE NUMBER BY THE LENGTH BY THE UNIT WEIGHT OF BAR. • SHOULD TRANSLATE TAKE-OFF NUMBERS ON THE A-CADS. • Rebar Steps: • Foundations: Strip, Isolated, Tie beams, FW • Floors, Columns, Walls, Retaining Walls, lintels • Slabs: P Beams, S Beams, Double Rib, Wall Beams, Ribs

  5. 4 D12mm/1m Wall height=3m 5 D14mm/1m 5D16mm/1m 7 D14mm/1m 0.35m 0.4m 0.25m 3.5m 0.4m 0.25m 4.8m

  6. 3.5mx4.5mx3m interior dim. Reservoir Overlap=40*max diam.= 0.64m • Foundation: • Stirrups: • [(4.8-0.05)*2]+[(0.35-0.05)*2]+0.2= 10.3m • Res. Length=4.5+0.65+0.65=5.8m • [5.8*5]+1= 29 +1=30 stirrup • 30D16/5m+30D16/6m • Longitudinal: • Top bars= 4.8*7= 34 bar, length= 4.5+0.65+0.65=5.8m 6m • 68D14/6m • Walls: • Vertical: • length= 2.95m+0.35+0.20= 3.5m • Wall perimeter={2*(3.5+[0.25 C-C])}+{2*(4.5+[0.25C-C])}= 17m • Number of longitudinal bars= 17m*8bars per meter= 136 bar • 136D12/7m • Longitudinal: • Short wall length= 3.5+(0.25*2)= 4m • Long wall length= 4.5+(0.25*2)= 5m • Number of longitudinal bars= 3m*10*2= 60 • 120D14/4m • 120D14/5m 6m 5m 0.64

  7. Concrete for Water Reservoir

  8. Isolated Foundation 2.5m*3m*0.45m & Column0.25m*0.6m. FWH=1.3m • Stirrups: • (2*[(2.5-0.05)+(0.45-0.05)])+0.2= 5.9m6m • Number of stirrups= 3m*5stirrups per meter= 15+1=16 • 16D16/6m • Longitudinal: • (2*[(3.00-0.05)+(0.45-0.05)*2])+0.2= 6.9m7m • Number of stirrups= 2.5m*7stirrups per meter= 18 • 17D14/7m • Column C1: • Column Dowels: length=1.3+0.45+0.3+(overlap=40*16mm=0.65m)= 2.70m 3m 8D16mm/3m 4D16mm/6m • C1 above FL= 3.12(12 stones height)+0.3(slab)+0.64(overlap)= 4m 8D16/4m 0.65 overlap 8D16mm 7D8mm/1m Wall height=1.3m 5D16mm/1m 7 D14mm/1m 0.45m 1.125m 0.25m 1.125m 2.5m

  9. Civil Drawings (Foundations Drawings) A 1

  10. Civil Drawings (Foundations Drawings) A 1 TB TB TB f1c1 f1c1 TB TB TB

  11. Civil Drawings (Foundations Drawings) A 9.5 6 S1-1 1 4.00 S1-1 S1-1 3 3 3 6 7 5 S2-2 S1-1 3.5 TB TB 4.6 5 TB S2-2 f1c1 f1c1 3.5 9.50 TB TB TB 4 5m 4 S2-2 TB S2-2 TB S3-3 5 S3-3 S2-2 7 7 5 13m 3.7

  12. Strip Footings 0.2 0.3 5Q12/1m 0.40 6*16mm/1m 5*14mm/1m 0.50 10*12mm 12*14mm 0.60 0.10 0.10 0.10 0.10 1.4 0.10 0.10 1.6 S1-1 (Stair Case) S2-2 (Stone) 0.2 5*12mm/1m 0.50 6*12mm 0.10 0.10 0.10 1m S3-3 (Balcony)

  13. Strip foundations Rebar S1-S1 • S1-S1: 2 strips /6m& 2 strips/ 3m=3 strips length 6m • Stirrup length: [(1.4 -0.05)*2+(0.5-0.05)*2] + 0.2= 3.80= 4.00m • Stirrup count (compute length of foundation center to center): [(6m-1.4)*2+ (3-1.4)*2]=12m Count= 12*5 stirrups/m= 60 60Q12/4m • Longitudinal rebar: 3*10 Q12/6= 30Q12/6m

  14. S2-S2 • Longitudinal Rebar: • 1 strip of length 4m • 2Q12/4 • 12Q14/4 • 3 strips of length = 5m • 2*3stripsQ12/5= 6Q12/5 • 12*3stripsQ14/5= 36Q14/5 • 4 strips of length 7m • 2*4Q12/7= 8Q12/7 • 12*4Q14/7= 48Q14/7 • Stirrups: 1) [(1.6-0.05)*2+(0.6-0.05)*2]+0.2= 5m 2) [(1-0.05)*2+(0.3-0.05)*2)]+0.2= 2.6= 3 • S1-S1 length Center to center= 38m • 1) 38*6Q16/5= 228Q16/5m • 2) 38*5Q12/3= 190Q12/3= 95Q12/6 0.3 5Q12/1m 0.40 6*16mm/1m 12*14mm 0.60 0.10 0.10 0.10 1.6 S2-2 (Stone)

  15. Square Isolated Footings 0.3 1.3m 6*16mm/1m two way 5*8mm/1m 3.2m 6*14mm 0.20 0.60 0.50 0.10 CW1 0.10 2.6m 0.10 F1 5*12mm/1m 5*8mm/1m 0.60 6*12mm 6*16mm 0.30 0.60 0.30 C1 Tie Beam TB

  16. Civil Drawings (Roof Drawings) 4 B1 10*16/4 2*18/7 7*16/5 4*14/12 6*16/6 B2 12*16/4 8*16/7 8*14/5 8*14/6 B3 8*18/8 4*14/6 3*14/6 14-18-24 SB 0.20 40 SB SB SB SB SB B2 B2 CR 2*10 SB SB 2*12/3m 2*10 B1 B1 B1 B1 SB SB B2 B2 DR DR 2*10 B3 B3 SB SB

  17. 2*8/20cm 3*18/3.5m 5*16/4m 5*16/2.5m 4*16 5*16 5*16 8*16 4*16 4*14 3*14 6*16 4*14 0.3 3m 5m 5.5m 2.5m 1.00m B1 (1:15) B1 (1:100) *8/20cm 2*8/20cm 0.3 6*16 6*16/4m 4*16 6*16 4*16 B1 10*16/4 2*18/7 7*16/5 4*14/12 6*16/6 B2 12*16/4 8*16/7 8*14/5 8*14/6 B3 8*18/8 4*14/6 3*14/6 4*14 0.30m 4*14 0.3 SB (1:15) 5. m 4m 1.00m *8/20cm B2 (1:15) B2 (1:100) 0.3 4*16 0.30m 2*8/20cm DR&CR (1:15) 8*18/8 6*16 4*14 6*14 4*14 0.3 Roof Details 5. m 2.5m 1.00m B3 (1:15) B3 (1:100)

  18. Slab Rebar

  19. 3.5 3.00 2.5 2.5 5.0 2.9 3.7 4.35 1.1

  20. Masonry Types: • Zawyah: 1 Lm per piece • Silah: Araqa & Kalb: 1 Lm per piece • Dustour: 2 Lm per piece • Marabee’: 4 Lm per piece • Roukh: 1 Lm per piece • Arch: 3 Lm per piece • Balcony: each 1 Lm is taken as 2 Lm • Burtash: each 1 Lm is taken as 4 Lm

  21. 1.00 2.00 1.00 1.00 1.00 1.00 1.00 1.00 0.50

  22. Masonry Take off • Regular Masonry Take Off: • 4*(9.5-[1+4*0.25])= 30 LM • 10 (9.5-[5+10*0.25]= 20 LM • 2(9.5-[5+2*0.25]= 8 LM • 11(9.5-[2*0.25]= 99 LM • Masonry Pieces Take Off: • Lintels (Burtash)= 2*(2.2) + 6*(1.20) = 4.4+7.2= 11.60 LM • Corner Stones= 27*2= 54 • Opening corner stone= (10*7)+18= 88

  23. Quantity Takeoff: Steel Estimating • Steel bar standard diameters: 8mm, 10mm, 12mm, 14, 16, 18, 20, 32 • Steel bar standard lengths: 4, 5, 6, 7, 12 • Steel overlapping follow rule 40 * Q • If you have two bars of 10mm and 16mm, find the overlap distance? • Select the higher diameter and multiply with 40= 16*40=640=64cm • Distinguish between different types of steel

  24. Working Example: Bathroom Quantity & Pricing: Given information: • 3.6*2*3 • Window: 0.7*1.00 • Door: 0.8*2.1 • Bath tub: 0.7* • Ceramic: • Ceramic Floor: 2.9*2= 6m2 • walls: 11.2*3= 33.6 (33.6-[0.7+(0.8*2.1)])= 31.2 +2.7*0.15= 0.405 31.2+0.405= 31.6 Plaster quantity • Ceramic walls quantity= 31.6-0.7= 30.9m2 • Ceramic labor cost • 12KD for blinding= 12KD • 20KD*3days= 60KD • Joint filling: 1*12KD skilled rate= 12KD • Ceramic material cost= 3KD/m2 *37m2= 111KD • Total Cost= 111+12+60+12= 195KD • Plaster:= 31.6m2 • Plaster material (fine aggregate) cost= 31.6*0.02*1.1= 0.7m2 *2KD= 1.4KD • Plaster cement cost (1:3 means 10 cement bags per m3)= 7bags* 1.350= 9.450 • Labor cost:2days*20KD=40KD • Total cost= 1.4+9.5+ 40= 51KD

More Related