Ingeniero

DATOS

f'c = 210.00 Kg/cm²
fy = 4200.00 Kg/cm²
S/C = 600.00 Kg/m²
Acabados = 100.00 Kg/m²
b = 1.20 m
CP =0.18 m
P = 0.30 m
q = 30.96 °
t = 0.20 m
Recub = 2.00 cm
g C° = 2400.00 Kg/m3
hm = 0.31 m

0.25 m 2.00 m2.40 m 0.25 m

1. PREDIMENSIONADO
Espesor de la escalera
t = Ln/20 = 0.22 m
t = Ln/25 = 0.18 m
USAR t = 0.20 m2. METRADO DE CARGAS
Wu2
Wu1


2.125 m 2.525 m
X RB
Wu1 TRAMO DESCANSO
CargaMuerta Carga Viva
P.P = 576.00 Kg/m S/C = 720.00 Kg/m
Acabados = 120.00 Kg/m
696.00 Kg/m 720.00 Kg/m
WD1 = 835.20 Kg/m WL1 = 1152.00 Kg/m Wu1 =1987.20 Kg/m


Wu2 TRAMO PASOS
Carga Muerta Carga Viva
P.P = 899.55 Kg/m S/C = 720.00 Kg/m
Acabados = 120.00 Kg/m1019.55 Kg/m 720.00 Kg/m
WD1 = 1223.47 Kg/m WL1 = 1152.00 Kg/m Wu2 = 2375.47 Kg/m

3. CALCULO DE MOMENTO
RB = 5334.44 Kg

Elmomento maximo se dará en la seccion que posea el cortante igual a 0
Vx = 0 X = 2.25 m

(+) Mu max = 5989.60 Kg-m
(+) M diseño = 4791.68 Kg-m = 4.79T-m

4. DISEÑO EN ACERO
Para Momento Positivo: 4.79 T-m
Asumiendo varilla de acero: Ф = 1/2
b = 120.00 cm As = 1.27 cm²
d =17.37 cm
a = 1.50 cm USAR = 7 Ф 1/2 @ 19.5
As (+) = 7.63 cm² Ok!
As (+) = 7.63 cm²
S = 19.50 cm
# Varillas = 7
As min = 3.75...