LRFD

Column Load:

28 kip

Plate Properties:

N 25.98 in

B 14.37 in

36 ksi

Concrete Pier Properties:

3.0 ksi

B' 0 in

D' 0 in

Column Properties:

d 15.00 in

3.40 in

Bearing:

0.60

373.40

0

948.0 kip

1896.0 kip

948.0 kip

568.8 kip

Plate Thickness Design:

0.90

m 0.06 in

n 11.63 in

X 0.03l 0.17

n' 1.79 in

0.31

l 11.63 in

0.790 in

Pu

fy

f'c

Enter "0" for full support

bf

fc

A1 in2

A2 in2

Pp1

Pp2

Pp

fcPp

fc

ln'

tmin

Maximun Moment Reaction1) From previous calculations, Tu = 38.49 kips.

If three anchor bolts are used in each face on the column, the force per rods equal 12.83 kipsFrom Table 3.1, the design strength of 1-in.-diameter ASTM F1554 Grade 36 (ASTM A36) anchor rods is 25.6 kips

The pullout strength of each anchor rod with a heavy hex nut is selected from Table 3.2 as 25.2 kips, which is greater than the required strength per rod of 12.83 kips.

For completeness, determine the embedment length for the anchor rods.Try 13.78 in. of embedment.

The design concrete breakout strength is:

Considering the ratio between areas = 0.7

= 42419 lb

= 42.42 kips >= 38.49 kips

For moderate or high seismic risk, ACI 318-08 indicates that the strength of anchors is to be multiplied by 0.75. In thiscase, the steel strength would be 0.75(25.60) kips = 19.20 kips per rod (we need at least 12.83 kips). The anchor rods are o.k.

Use 6 Rods 1" x 350mm ASTM A36 or similar

2) Maximun shear force is:

Vu = 2718 kg

Vu = 5.99 kips

Stresses in rods:fv = 1.27 ksi <= 17.4 ksi

By inspection 3/4-in. plate washers will suffice even with minimal edge distance. Thus, the lever arm can be takenas one half of the sum of the base plate thickness and 0.750 in, the base plate thickness is 0.75in

Lever arm = 0.75 in

Thus:

Mt = 2.25 kip.inZ = 0.17 in^2

ftb = 13.48 ksi

fta = 8.17 ksi

The tensile stress is:

ft = 21.65 ksi

Combined shear and tension strength:

Fnt = 43.50 ksiFnv = 23.20 ksi

= 40.03 ksi <= 32.63 ksi

= 32.63 ksi >= 21.65 ksi

If three anchor bolts are used in each face on the column, the force per rods equal 12.83 kipsFrom Table 3.1, the design strength of 1-in.-diameter ASTM F1554 Grade 36 (ASTM A36) anchor rods is 25.6 kips

The pullout strength of each anchor rod with a heavy hex nut is selected from Table 3.2 as 25.2 kips,

OK

For moderate or high seismic risk, ACI 318-08 indicates that the strength of anchors is to be multiplied by 0.75. In thiscase, the steel strength would be 0.75(25.60) kips = 19.20 kips per rod (we need at least 12.83 kips).

OK

By inspection 3/4-in. plate washers will suffice even with minimal edge distance. Thus, the lever arm can be takenas one half of the sum of the base plate thickness and 0.750 in, the base plate thickness is 0.75in

OK