Outside bin hold-down chart (2.66" corrugation), Foundation – Grain Systems Tanks PNEG-1093 User Manual

Page 21

5. Foundation

PNEG-1093 2.66" Corrugation Unstiffened Bin

Outside Bin Hold-Down Chart (2.66" Corrugation)

Outside bin hold-downs should be used on all non-stiffened bins/silos. When anchoring the bin, be sure
the vertical seams of the bin/silo align with the U-bolts or single anchor bolts in the foundation. Bin/silos
up to 36' diameter and 12 rings tall or shorter may be anchored using either the U-bolt/J-bolt combination
or the single anchor bolt. Bin/silos 42' and greater in diameter and all 13 rings or taller should be anchored
using the single anchor bolt. Bins/silos 13 rings and taller require double hold-downs. The sidewall must
be field drilled to attach the hold-down bracket located between the horizontal seams. For the case of
42' and larger bin/silo, no greater than 12 rings tall, double U-bolt/J-bolt combination anchors may be
used as an option to the single anchors bolt. Additional hold-downs are required with this option. Refer to

Page 53

for outside hold-down bracket details.

Single Anchor Bolt Chart

Bin Diameter

“B” Bolt Circle Radius

For 3-12 Rings

# of Anchors

“E” Chord Distance

12'

6' - 1-3/8"

8' - 7-3/4"

15'

7' - 7-1/4"

8' - 11-5/16"

18'

9' - 1-3/16"

21'

10' - 7-1/16"

9' - 2-1/4"

24'

12'-1"

9' - 2-15/16"

27'

13' - 6-7/8"

9' - 3-7/16"

30'

15' - 0-13/16"

9' - 3-3/4"

33'

16' - 6-11/16"

9' - 3-15/16"

36'

18' - 0-9/16"

9' - 4-1/8"

42'

21' - 0-7/16"

9' - 4-3/8"

48'

24' - 0-1/4"

9' - 4-1/2"

60'

29' - 11-7/8"

9' - 4-9/16"

Double Hold-Down Anchors Required

for 13-15 Rings

# of Anchors

“F” Chord Distance

4' - 8-3/16"

4' - 8-3/8"

4' - 8-1/2"

4' - 8-9/16"

4' - 8-1/2"