Procedimientos básicos para cuantificar /diseñar tu centro de costos de obra.
Comenzamos:
1.66m3 de
pierda por 1m3 de mampostería
1m3 de
cimentación de mampostería = 0.34m3
EXCAVACION:
Horizontal
32.310m3
Paralelo
25.825m3
Total 58.135 + 25%
abundamiento = 72.66m3 = 12 camiones/6m3
Plantilla f1c
= 100Kg/cm2
Volumen de cimentación
27.46m3
Concreto 1:1:4 para pegar piedra
Volumen de mortero
9.3364m3
Material
de cimentación
Cemento N°. Sacos: 58 sacos
Calidra N°. Sacos:
58 sacos
Arena viajes: 2 viajes
Agua tinacos: 17 tinacos
Piedra Viajes: 9 viajes
Cadena
cimentación
Varilla 3/8: 53
varillas para estribos y armado de cadena
Alambron/rollos: 6
Cemento: 30 sacos
Arena: 2m3
Agua: 14 tinacos
Grava: 1.01m3
Volumen de mortero
(0.34m3)(27.46 m3)=9.3364 m3
de mortero
Concreto (9.3364)(.309)=2.88Ton
N°. Sacos (2.88) (1000Kg/tn)
50kg/saco =
57.6 sacos = 58 sacos
Calidra
(9.3364m3)(0.155ton/m3m) = 1.45tm
N°. Sacos =
(1.45lm)(1000kg/tn)
25 Kg Sacos = 58 Sacos
Arena
(9.3364m3)(1.080m3/ m3m) =
10.08 m3
N°. Viajes = 10.08m3
6m3/viaje = 1.68 viajes
= 2 viajes
Agua
(9.3364m3)(0.364m3) = 3.39 m3
N°. Tinacos = (3.39m3)
(1000lt/m3)
200(lt/tinaco) = 16.45
= 17 tinacos
Piedra
(1.66m3 piedra)(27.46m3)
Cantidad total de piedra: 45.5836 + 15% = 52.42
N°. De viajes = 52.42m3
6m3/viaje = 8.73 = 9 viajes
Varilla 3/8” cadena cimentación
133.58ml x 4 = 534.32
12mvarilla = 44.52 = 45 + 9.5% = 49.27 = 50 varillas
Estribos 3/8”
133.58ml ÷ 0.20 = 667.9 estribos = 668 estribos
667.9 x 0.03 = 20 m ÷ 12 = 1.6 = 2 varillas
2 varillas +
9.5% = 3 varillas
Alambrón 1/4”
0.20m x 4 = 0.8 x 667.9 estribos = 534.32m
534.32 ÷ 18Kg = 29 Kg + 10% = 32 Kg.
Volumen
de cimentación f1c
= 200Kg/cm2 = 4m3
(0.15) (0.20) x 133.58ml
= 4ml
Agregado máximo de 3/4"
Revenimiento: 10cm
Cemento:
(0.366m3/m3c) (4m3) = 1.464ton = 29.28sacos =
30 sacos
Arena: (0.508m3/m3c)(4m3) = 2Ton/m3
Agua: (0.702 m3/m3c)(4m3)
= 2.808m3 = 14 tinacos
Grava: (0.254 m3/m3c)(4m3) = 1.01m3
Pie tablón:
Eje
1.- (11m)
(20) (2) = 440m2 (1) 440m3 (8”) (2”) = 7040m3
7040m3 ÷ 144 = 48.8
pie tablón
2.- (11m)
(20)(2) = 440m2 (1) 440m3 (8”)(2”) = 7040m3
7040m3 ÷ 144 = 48.8
pie tablón
2a.- (.5) (20)
(2) = 20 (1) 20m3 (8”) (2”) = 320m3
320 ÷ 144 = 2 pie tablón
3.- (7.85)
(20) (2) = 314m2(1) = 314m3 (8”) (2”) = 5024m3
5024 ÷ 144 = 34 pie tablón
4.- (7) (20)
(2) = 280m2 (1) 280m3 (8”) (2”) = 4480m3
4480m3 ÷ 144 = 31
pie tablón
5.- (11)
(20) (2) = 440m2 (1) 440m3 (8”) (2”) = 7040m3
7040 ÷ 144 = 48.8 pie tablón
6.- (7.35)
(20) (2) = 294m2 (1) 294m3 (8”) (2”) = 4704m3
4704m3 ÷ 144 = 32
pie tablón
7.-
(3.5) (20) (2) =140m2 (1)140m3 (8”) (2”) = 2240m3
2240m3 ÷ 144 = 15
pie tablón
8.- (5.5)
(20) (2) = 220m2 (1) 220m3 (8”) (2”) =3520m3
3520m3 ÷ 144 = 24.4 pie tablón
Paralelo:
A.- (20)
(20) (1) = 800m2 (1) 800m3 (8”) (2”) = 12,800m3
12,800m3 ÷ 144 =
88.88 pie tablón
A1.-
(2.850) (20) (2) = 114m2 (1) 114m3 (8”) (2”) = 1824m3
1824m3 ÷ 144 =
14.66 pie tablón
B.-
(14.58) (20) (2) = 583.2m2 (1) 583.2m3 (8”) (2”) =
9331.2m3
9331.2m3 ÷ 144 = 64
pie tablón
C.-
(4.25) (20) (2) = 170m2 (1) 170m3 (8”) (2”) = 2720m3
2720m3 ÷ 144 = 18.8
pie tablón
D.- (7)
(20) (2) = 280m2 (1) 280m3 (8”) (2”) = 4480m3
4480m3 ÷ 144 = 31pie
tablón
H.-
(20) (20) (2) = 800m2 (1) 800m3 (8”) (2”) = 12,800m3
12,800m3 ÷ 144 = 88.88 pie tablón
Total Horizontal: 282 pie
tablón
Total Paralelo: 301 pie tablón
Total: 583 pie tablón
Tabique
7x14x28 Recordando que 43.21 es el redimiento proporcionado de tabique
-1÷ A y F (2.5)
(43.21pz/m2)(27.5)
= 1188.27= 1188pzas = 1.2 millares
-A÷ 1 y 7 (2.5)
(43.21pz/m2)(42.5)
= 1836.42= 1836pzas = 1.8 millares
-A÷ 7 y 8 (3.97)
(43.21pz/m2)(21.83)
= 943.27= 943pzas = 0.9 millares
-F÷ 1 y 8 (2.5)
(43.21pz/m2)(50) =
2160.5= 2160pzas = 2.2 millares
-8÷ A y C (3.97)
(43.21pz/m2)(18.885)
= 816.02= 816pzas = 0.8 millares
-7÷ A y B (2)
(43.21pz/m2)(3.45)
= 149.07= 149pzas = 0.17 millares
-6÷ E y F (2.5)
(43.21pz/m2)(23) =
99.383= 100pzas = .1 millares
-5÷ A y B (2.5)
(43.21pz/m2)(3.45)
= 149.07= 149pzas = 0.17 millares
-4÷ A y B (2.5)
(43.21pz/m2)(5.2) =
224.69 = 225pzas = 0.225 millares
-B÷ 7 y 8 (3.97)
(43.21pz/m2)(21.83)
= 943.27= 943pzas = 0.9 millares
-B÷ 4 y 7(2.5)
(43.21pz/m2)(15.55)
= 671.9 = 671pzas = 0.671 millares
-B÷ 2 y 3 (2.5)
(43.21pz/m2)(8.6) =
371.6 = 371pzas = 0.371 millares
+(43.21pz/m2)(2.5)
= 108 = 108 pzas = 0.108 millares
-C÷ 4 y 5
(43.21pz/m2)(5)
= 216pzas = 0.216 millares
-D÷ 4 y 5
(43.21pz/m2)(5)
= 216pzas = 0.216 millares
-4÷ C y D
(43.21pz/m2)(1.8) =
77.77 = 77pzas = 0.077 millares
-5÷ C y D
(43.21pz/m2)(2.15)
= 92.90 = 92pzas = 0.09 millares
-3÷ D y F
(43.21pz/m2)(9.62)
= 415.6 = 416pzas = 0.416 millares
Total de millares: 10.63 = 11
millares
Calculo cantidad de mortero
para pegar muro m3 mortero (0.042m3/m3)
Eje
Eje
1÷ A y F = 1.155m3 B÷ 7 y 8
= 0.916 m3
A÷ 1 y 7 = 1.785m3 B÷ 4 y 7
= 0.653 m3
A÷ 7 y 8 = 0.916m3 C÷ 4 y 5 = 0.2100m3
F÷ 1 y 8 = 2.100m3 D÷ 4 y 5
= 0.2100 m3
8÷ A y C = 0.79m3 4÷ C y D
= 0.075 m3
7÷ A y B = 0.144m3 5÷ C y D = 0.090 m3
6÷ E y F = 0.096m3 3÷ D y F = 0.404 m3
5÷ A y B = 0.144 m3 B÷ 2 y 3 = 0.361 m3
4÷ A y B = 0.218m3 2.919m3
7.348m3
Volumen:
Total = 10.267
Mortero
Total de materiales utilizado
una porción 1:1:6
Cemento: 0.263ton/m3
(10.267m3) = 2.7ton = 54 Sacos
Arena: 0.129 ton/m3 (10.267m3) = 1.324Ton = 53 Sacos
Agua: 1.134 m3/m3
(10.267m3) = 11.6m3 = 2 camiones
Grava: 0.363 m3/m3 (10.267m3) = 3.72 m3 = 18 tinacos/200lt.
Cuantificación de
castillos planta baja
Varilla castillos:
(K-2) 45 castillos a 2.5
altura = 112.5 x 4 = 450m ÷ 12 =
37.5 = 38 varillas
Estribos: 562 estribos
(K-2) 562.5 x 0.0375 = 21m ÷
12m ÷ 1.75 varillas = 2 varillas
2 + 9.5% = 3 varillas
Alambrón N°. 18
0.20 x 4 =0.8m x 562.5
estribos = 472.5m
472.5 ÷ 18Kg = 26 Kg + 10% =
29 Kg
Eje 8= 15.88 x 4 = 63.52m ÷
5.3= 5 varillas
Estribos = 80 estribos
(K-2) 80 x 0.0375 = 3m ÷ 12 m
= 0.25 = 1 varilla
Alambrón
.20 x 4 =0.8 x 80 =64m
64÷18Kg = 3 Kg + 10% 3 KG
Total de varilla: 46
Total de estribos: 643
Alambrón: 3 Kg
Volumen castillos f1c = 250 Kg/cm2
(0.25)(0.15)= 0.0375 (112.5)=
4.21ml
Agregado máximo de 3/4"
Revenimiento 10cm
Cemento:
(0.423m3/m3) (4.2m3) = 35sacos
Arena: (0.5022m3/m3) (4.2m3) = 2.1m3
Agua: (0.247m3/m3) (4.2m3)
= 1.03m3 = 5.5 tinacos/200lt
Grava: (0.6912m3/m3) (4.2m3) =2.9 m3
Pie tablón
(112)(20)(2)= 4480m2
(1) 4480m3 (8”) (2”)
71680m3 ÷ 144 =
497.7 = 498 pie tablón
Eje 8
(15.88)(20)(2)= 635.2m2 (1)
635.2m3 (8”) (2”)
10100m2 ÷ 144 = 70
pie tablón
Pie Tablón total: 568 pie
tablón
Firme
de concreto: f1c = 150 Kg/cm2 cantidad de concreto:
108.8625m3 (ancho y largo)
3.5 x 14.85: 51.97m3
2 x 1.25: 2.5m3
2.35 x 1.35: 2.9375m3
7 x 7.35: 51.45m3
108.8625m3
Cemento: (0.333ton/m3c)
(108.8625m3c) = 725 Sacos
Arena: (0.578m3/m3c) (108.8625m3c) = 62m3= 10 camiones/6m3
Agua: (0.724m3/m3c) (108.8625m3c)
= 78m3
Grava: (0.273m3/m3c) (108.8625m3c) = 29 m3
Acero losa entre piso
Eje A, B÷2 y 7 (7x3.5) = 24.5
7÷.10 = 70 + 1 =71 varillas
71 x 3.9 = 276.9ml
3.5 ÷ .10 = 35 + 1 = 36
varillas
36 x 7.4 = 266ml
5.42ml x 0.557Kg (3/8) =
301.89 Kg
45+10% = 46 varillas
Eje B,e ÷ 2 y 4 (7.35 x 5) =
36.75
7.35÷.10=73+1=74 varillas
51x7.75=396.25ml
794.85mlx0.557=442.73
66+10% = 72 varillas
Eje C,f ÷ 4 y 5 (5.35x2) = 10.7
5.35÷10=53+1=54 varillas
54x2.4=129ml
2÷10=20+1=21varillas
21x5.75= 120.75ml
144.75%x0.557=97.33Kg
12+10%=13 varillas
Eje E,f ÷5 y 6 (2.35x1.25) = 2.93
2.35÷.10=23+1=24varillas
24x1.65=39.6ml
1.25÷.10=12+1=13varillas
13x2.75=35.7ml
75.3x0.557=41.94Kg
6+10%= 7 varillas
Eje A, B ÷ 7 y 8
(3.5x2.85)=9.97
3.5÷.10=35+1=36varillas
36x3.25=117ml
2.85÷.1028+1=29varillas
29x3.9=113.1ml
230x0.557=128.11Kg
19+10%=20varillas
CONCRETO: f1c= 250
kg/cm2
Revenimiento
10 cm
Volumen =84.85x.10=8.485cm3
Cemento: (0.423ton/m3)
(8.485m3) = 3.58m3
Arena: (0.5022ton/m3) (8.485m3) = 4.261m3
Agua: (0.6912ton/m3) (8.485m3)
= 2.09m3 =10 tinacos/200lt
Grava: (0.247ton/m3) (8.485m3) = 5.864 m3
Total de varillas: 158
Dala:
84.85ml x 4 = 219 ÷ 12 = 18 +
10% = 20varillas
Estribos
84.85 ÷ 0.20 = 424 estribos
424 x 0.03 = 12 ÷ 12 = 1
varilla
1 + 10 % = 1 varilla
Alambrón
0.20x 4 = 0.8m x 424 = 339.2
339.2 ÷ 18Kg = 18Kg + 10%= 20kg
Volumen dalas: f1c=250kg/cm2 (0.15)(0.25) = 0.0375
0.0375x84.85 = 1.34
Cemento: (0.423ton/m3)
(1.34 m3) = 0.56682 = 11 Sacos
Arena: (0.5022ton/m3) (1.34 m3) = 0.67m3
Grava: (0.6912ton/m3) (1.34 m3) = 0.926 m3
Agua: (0.247ton/m3) (1.34m3)
= 0.330m3 =1.6 tinacos/200lt
Pie tablón
(84.85)(20)(2) 3394m2
(1) 3394m3 (8”)(2”)
54304m3 ÷ 144 = 377.11 = 378 pie tablón
Muros segundo piso
Eje
A ÷ 2 y 5
(43.21pz)(17.5)
= 756pzas = 0.756 millar
2
÷ A y F
(43.21pz)(11.75)
507pzas = 0.507 millar
F
÷ 2 y 6
(43.21pz)(20.62)
890pzas = 0.89 millar
4
÷ A y B
(43.21pz)(9.35)404pzas
= 0.404 millar
B
÷ 2 y 3
(43.21pz)(10)432pzas
= 0.432 millar
D
÷2 y 3
(43.21pz)(10)432pzas
= 0.432 millar
3
÷ B y F
(43.21pz)(13.92)601pzas
= 0.601millar
6
÷ E y F
(43.21pz)(5.87)253pzas
= 0.253 millar
4a
÷ E y F
(43.21pz)(3.97)171pzas
= 0.171 millar
E
÷ 3 y 6
(43.21pz)(10.6)458pzas
= 0.458 millar
B
÷ A y 5
(43.21pz)(5)216pzas
= 0.216 millar
5
÷ A y B
(43.21pz)(6.75)291pzas
= 0.291millar
Total
Pzas: 5411
Total
millar: 5.411 = 6
Volumen
de mortero = 5.26
Proporción:
1:1:6
Cemento:
(0.263tn/m3) (5.26m3) = 1.38 = 27.6 Sacos
Cal: (0.129tn/m3) (5.26m3) = 0.678m3
Arena: (1.134m3/m3) (5.26m3)
= 5.96m3
Agua: (0.363m3/m3) (5.26m3) = 9.5 tinacos/200lt
Varilla para castillos de
segundó piso
(K-2) 3+castillos a 2.5 altura = 92.5ml x 4 = 370m ÷ 12
30.8 = 31 varillas
Estribos
92.5 ÷ .20 = 462 x 0.0375 = 17
= 2 varillas
Alambrón N°. 18
0.20 x 4 = 0.8m x 462 = 396.6m
396.6 ÷ 18kg = 22kg + 10 % =
26kg
Volumen castillos f1c = 250kg/cm2
(0.25)(0.15) = 0.0375 x 92.5ml
= 3.46m3
Revenimiento 10 cm
Cemento: (0.423ton/m3)
(3.46 m3) = 29 Sacos
Arena: (0.5022ton/m3) (3.46 m3) = 1.73 m3
Grava: (0.6912ton/m3) (3.46 m3) = 2.39 m3
Agua: (0.247ton/m3) (3.46 m3)
= 4 tinacos/200lt
Pie tablón
(92.5)(20)(2)3700m2
(1) 3700m3 (8”) (2”)
59200m3 ÷ 144 = 411 pie tablón
Losa (acero)
(10.85)(9.75)
10.85 ÷ 0.125 = 86.varillas
80 x 10.15 = 872.9ml
9.75 ÷ 0.25 = 39 varillas
39 x 11.25 = 438.75 ml
1311.65 x 0.557kg = 730.58 kg
109 + 10 % = 120 varillas
Concreto f1c =
250kg/cm2 Revenimiento
10cm
Volumen: 105.78 x 10 = 10.5cm2
Cemento: (0.423ton/m3)
(10.5cm2) = 4.4m3 = 88 Sacos
Arena: (0.5022ton/m3) (10.5cm2) = 5.27 m3
Grava: (0.6912ton/m3) (10.5cm2) = 7.25 m3
Agua: (0.247ton/m3) (10.5cm2)
= 12 tinacos/200lt
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