Anchor Bolt Head Type
There are 5 standard types of
anchor bolt head:
- Square
- Heavy Square
- Hex
- Heavy Hex
- Hardened Washer SAE
- Hardened Washer USS
Hardened Washer USS has larger A
brg area than
Hardened
Washer SAE.
User can select
above 5 standard type heads or custom
head if the anchor bolt head is non
standard.
Anchor head type determines the anchor head bearing
area A
brg value. A
brg is the
net bearing area of the
head of anchor bolt. It's used in the anchor pullout and
side blowout resistance calculation.
If standard head is selected, the A
brg will
be set
automatically by the program.
Please note for anchor bolt
dia >1.5" many head types
are not commercially available and user will find
the
A
brg = -1.000 in
2. When this occurs user shall
change
head type to
Heavy Hex or
Custom Head. Heay Hex
head type is available for all diameter of anchor rod.
If Custom Head is
selected, user shall key in the A
brg value manually in the
orange color cell below.
The custom head A
brg can be
calculated as
A
brg = (head area - anchor rod shank area) ,
which is
shown as hatch area below.