1. Anchor
Channel Systems
Code
2. HAC
Portfolio
3. HAC
Applications
4. Design
Introduction
Discussion
5. Base material
6. Loading
Calculations
Step 5: Steel strength local flexure channel lip and flexure of channel
ESR-3520
section 4.1.3.6
Point of load application — channel lip
Channel lip in tension and shear and Flexure of channel in tension. The interaction
check for steel failure of the channel requires the ratio (factored load acting on the
channel lip or Flexure of channel design strength) to be checked using Equation (45)
and Equation (46) in ESR-3520. V bua,x =0lbs
Point of load application - channel lip β 2N,sl = 0.02070
β 2V,sl,y = 0.08801
β 2N,sl + β 2V,sl,y =0.11
b
æ N ua
ö æ V
ç
÷ + ç ç
è f N sl ø è f V sl , y
b
ua , y
a
ö æ V ua b , x
÷ ÷ + ç ç
ø è f V sl , x
2
ö
÷ ÷ £ 1.0
ø
Point of load application — flexural moment and channel lip
æ M u , flex
ç ç
è f M s , flex
a
ö æ V ua b , y
÷ ÷ + ç ç
ø è f V sl , y
a
ö æ V ua b , x
÷ ÷ + ç ç
ø è f V sl , x
8. Reinforcing
Bar Anchorage
Code
ESR-3520 section
4.1.3.2.2
10. Design
Software
11. Best
Practices
12. Instructions
for Use
Discussion
13. Field Fixes
14. Design
Example
Calculations
Channel bolt strength in tension: N bua = 850 lbs
Ф N ss ≥ N bua ФN ss 18353 lbs
nominal strength corresponding to the T-bolt → N ss N bua
β N,ss : ____
x 100 = 5 %
ФN ss
Utilization: 11% Nominal tension steel strengths for T-bolts are given in ESR-3520 Table 8-7.
Point of load application — flexural moment and
channel lip N ss for an M16 diameter HBC-C 8.8 F T-bolt = 28,235 lb Ф=0.65
β N,s,flex = 0.00654
β′ V,sl,y = 0.21858
β N,s,flex + β′ V,sl,y = 0.23
Utilization: 23%
ESR-3520 section
4.1.3.3.2, 4.1.3.4.2
2
ö
÷ ÷ £ 1.0
ø
α = 2 for anchor channels with V sl,y ≤ N s,l
α = 1 for anchor channels with V sl,y > N s,l
It shall be permitted to assume reduced values for V sl,y corresponding to the use of an
exponent α = 2. In this case the reduced value for V sl,y shall also be used in Section
4.1.3.3.1a).
9. Special Anchor
Channel Design
Step 6: Channel bolt strength
Combined tension and shear loads — flexure moment and channel lip (Interaction )
a
7. Anchor Channel
Design Code
Channel bolt strength – without lever arm, longitudinal shear included in shear: V bua,x = 1750 lbs
Ф V ss ≥ V V bua,y = 0 lbs
b
ua
V bua = V bua,x 2 + V bua,y 2 V bua = 1750 lbs
nominal strength corresponding to the T-bolt → Vss V bua
β v,ss : _____
x 100 = 18 %
Ф V ss
Ф V ss = 10164 lbs
Nominal tension steel strengths for T-bolts are given in ESR-3520 Table 8-7.
Vss for an M16 diameter HBC-C 8.8 F T-bolt = 16940 lb
Ф=0.60
ESR-3520 section
4.1.3.6
Combined tension and shear loads — Channel bolt (Interaction )
β 2N,ss = 0.00214
β 2v,ss = 0.02964
β 2N,ss + β 2v,ss = 0.03178
Utilization : 4%
396
Cast-In Anchor Channel Product Guide, Edition 1 • 02/2019
397