LEDGE Beam Design
Project No. Date --------DESIGN CALCULATION SHEET Sheet No. -- Computed by of -- Checked by Subject -----------
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Project No.
Date
--------DESIGN CALCULATION SHEET
Sheet No. --
Computed by
of
--
Checked by
Subject
-------------
Building
Design of Beam Ledge
-Approved by _
DESIGN OF BEAM LEDGE ACCORDING TO ACI 318 - 99 Beam-B2 Ledge Material Properties Concrete Cylinder Strength (f 'C)
=
300
Kg/Cm2
Steel Yield Stress (fY)
=
4150
Kg/Cm2
Section Properties Total Thickness (h)
=
20.00
Cm
Depth of Section (d)
=
17.00
Cm
=
10.00 13.00
Cm Cm
Load distance to face of Beam (a) Load distance to center of Stirrup's Leg (a f)=
a /d= 0.59
af a
Unit Width of bearing plate / pad (W)
=
240.00
Cm
Unit distance of distributed Loads (S)
=
240.00
Cm
Vu
Nuc
< 1
Av (F 2) As +
Ah (F 1)
h d Straining Actions Ultimate Vertical Force (Vu)
=
20.00
t
Ultimate Normal Force (Nuc) Effective width for M & N=(W+5a f )or S
= =
0.00 240.00
t (Min. = 0.20 Vu = Cm
Ultimate Moment (MU)=Vu.af+Nuc(h-d)
=
2.72
m. t
Effective width for Shear =(W+4a) or S Shear Strength ( f Vn)
=
240.00
Cm
=
195.06
t
=
5.76
Cm2 / effective width of
4 F 1 + Cover 4.00
t)
ACI - 11.9.3.4 ACI - 11.9.3
ACI - 11.9.3.2.1
Main Reinf. (F 1) Calculations Reinforcement for Flexure (A f)
2
240.00 Cm
Min. to ACI-10.5
Reinforcement for Normal force (A n)
=
1.13
Cm / effective width of
240.00 Cm
ACI - 11.9.3.4
Reinforcement for Shear Friction (Avf)
=
4.05
Cm2 / effective width of
240.00 Cm
ACI - 11.7.4.1, Eqn. (11-25)
Main Reinforcement (A s)
=
0.0492
Cm2 / Cm
Total Area of Stirrups (A h) Provide (A s+A h) = 0.0714
= Cm2 / Cm
ACI - 11.9.3.5 & 11.9.5
2
0.0222 @
Cm / Cm F 12 @
10.00
Cm
ACI - 11.9.4
150 mm
Check of bearing
Av
Bearing plate length ( L ) Bearing Strength (f Pnb)= f.0.85.f'c.W.L
= =
428.40
>
t
Vu
L
df/2
As + Ah (F 1)
d f /2
Check of punching Assume d f = d Punching Strength (f Pnp)
df =
78.04
Check Required Area for Hanger Reinf. (F 2) Spacing between Vertical hangers(ss) = 200 A v = Vu . Spacing (ss) / ( f fy.S) = 0.472
>
t
Vu
Av
0.535 =
F
Section
O.K.
mm Cm2
Verifying the serviceability
A v = (Vu/1.5) . (SS) / ( 0.5 . Fy). (W) =
6/18/2017 at 10:27 AM
(F 2)
O.K.
Cm2
(governs)
W
Plan
8 @ 200
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ACI-BEAM LEDGE.xls