Geosynthetics June/July 2022 - 31

While these liners provide a uniform
and clean fit to the tank, the liners must
be installed by qualified technicians, as
the radial weld, extrusion and subsequent
cap patching and testing are crucial to
quality and compliant installation.
This brings us to tapered liners. A
tapered liner is a flat sheet made with
staggered liner panels to create a diameter
large enough to fit an AST floor,
wall and overlap.
In Figure 4, a 12 foot (3.7 m) tall, 200
foot (61.0 m) diameter tank requires a
tapered liner of 232 feet (70.7 m). This is
200 feet (61.0 m) for the floor, 24 feet (7.3
m) total for the two walls and 8 feet (2.4
m) excess to allow 4 feet (1.2 m) over the
back of the tank all around to terminate
and hold the liner outside the tank.
A typical installation requires the liner
to be stretched out on the ground and
folded back in on itself to allow the AST
walls to be installed and secured around
the liner. The liner is then unfolded back
up and over the AST walls, allowing the
excess material to be draped along the
walls vertically and evenly around the
inside of the tank. In many applications,
clamps are put on the top ring of the tank
to secure the liner and the excess material,
then secured below the top edge with
straps or a thick cable. The most significant
advantage of these liners is there is
no one single radial field weld, a potential
point of failure, as the liners are factorywelded
and folded into one single piece,
considerably reducing risks associated
with field fabrication. However, challenges
and careful considerations remain.
During the installation of the tapered
liner, the wrinkles along the walls must
be installed uniformly around the interior
of the tank. Also, with a typical AST
containing no hard tank bottom, the
tapered tank liner's integrity is contingent
on a properly prepared and compacted
subgrade. With the tapered liner being
anchored at the top, any movement of the
200' DIA - 12' WALL - 4' OVERHANG - 22.3
232' DIA
4' OVERHANG
224' DIA
12' WALL
200'
BASE DIA
123'-6 "
174'-9 "
204'-9 "
222'-9 "
232'
10'-11 " CENTER
232'
DESIGN PROPERTY OF:
®
TARP & LINER
www.inlandtarp.com
123'-6 "
174'-9 "
204'-9 "
222'-9 "
232'
13'-8 "
28'-9 "
54'-4 "
4'-8 "
FIGURE 4 Typical tapered liner fabrication drawing
1/3 Horizontal
4.5 x 4.875
No Bleed
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GeosyntheticsMagazine.com
31
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Geosynthetics June/July 2022

Table of Contents for the Digital Edition of Geosynthetics June/July 2022

Geosynthetics June/July 2022 - Cover1
Geosynthetics June/July 2022 - Cover2
Geosynthetics June/July 2022 - 1
Geosynthetics June/July 2022 - 2
Geosynthetics June/July 2022 - 3
Geosynthetics June/July 2022 - 4
Geosynthetics June/July 2022 - 5
Geosynthetics June/July 2022 - 6
Geosynthetics June/July 2022 - 7
Geosynthetics June/July 2022 - 8
Geosynthetics June/July 2022 - 9
Geosynthetics June/July 2022 - 10
Geosynthetics June/July 2022 - 11
Geosynthetics June/July 2022 - 12
Geosynthetics June/July 2022 - 13
Geosynthetics June/July 2022 - 14
Geosynthetics June/July 2022 - 15
Geosynthetics June/July 2022 - 16
Geosynthetics June/July 2022 - 17
Geosynthetics June/July 2022 - 18
Geosynthetics June/July 2022 - 19
Geosynthetics June/July 2022 - 20
Geosynthetics June/July 2022 - 21
Geosynthetics June/July 2022 - 22
Geosynthetics June/July 2022 - 23
Geosynthetics June/July 2022 - 24
Geosynthetics June/July 2022 - 25
Geosynthetics June/July 2022 - 26
Geosynthetics June/July 2022 - 27
Geosynthetics June/July 2022 - 28
Geosynthetics June/July 2022 - 29
Geosynthetics June/July 2022 - 30
Geosynthetics June/July 2022 - 31
Geosynthetics June/July 2022 - 32
Geosynthetics June/July 2022 - 33
Geosynthetics June/July 2022 - 34
Geosynthetics June/July 2022 - 35
Geosynthetics June/July 2022 - 36
Geosynthetics June/July 2022 - 37
Geosynthetics June/July 2022 - 38
Geosynthetics June/July 2022 - 39
Geosynthetics June/July 2022 - 40
Geosynthetics June/July 2022 - 41
Geosynthetics June/July 2022 - 42
Geosynthetics June/July 2022 - 43
Geosynthetics June/July 2022 - 44
Geosynthetics June/July 2022 - Cover3
Geosynthetics June/July 2022 - Cover4
https://www.nxtbook.com/ata/geosynthetics/geosynthetics-april-may-2024
https://www.nxtbook.com/ata/geosynthetics/geosynthetics-february-march-2024
https://www.nxtbook.com/ata/geosynthetics/geosynthetics-december-2023-january-2024
https://www.nxtbook.com/ata/geosynthetics/geosynthetics-october-november-2023
https://www.nxtbook.com/ata/geosynthetics/geoysynthetics-august-september-2023
https://www.nxtbook.com/ata/geosynthetics/geosynthetics-june-july-2023
https://www.nxtbook.com/ata/geosynthetics/geosynthetics-april-may-2023
https://www.nxtbook.com/ata/geosynthetics/geosynthetics-february-march-2023
https://www.nxtbook.com/ata/geosynthetics/geosynthetics-december-2022-january-2023
https://www.nxtbook.com/ata/geosynthetics/geosynthetics-october-november-2022
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-august-september-2022
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-june-july-2022
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-april-may-2022
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-february-march-2022
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-december-2021-january-2022
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-october-november-2021
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-august-september-2021
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-june-july-2021
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-april-may-2021
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-february-march-2021
https://www.nxtbook.com/ifai/geosynthetics/1220GS
https://www.nxtbook.com/ifai/geosynthetics/1020GS
https://www.nxtbook.com/ifai/geosynthetics/0820GS
https://www.nxtbook.com/ifai/geosynthetics/0620GS
https://www.nxtbook.com/ifai/geosynthetics/0420GS
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https://www.nxtbook.com/ifai/geosynthetics/1219GS
https://www.nxtbook.com/ifai/geosynthetics/1019GS
https://www.nxtbook.com/ifai/geosynthetics/0819GS
https://www.nxtbook.com/ifai/geosynthetics/0619GS
https://www.nxtbook.com/ifai/geosynthetics/0419GS
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https://www.nxtbook.com/ifai/geosynthetics/1218GS
https://www.nxtbook.com/ifai/geosynthetics/1018GS
https://www.nxtbook.com/ifai/geosynthetics/0818GS
https://www.nxtbook.com/ifai/geosynthetics/0618GS
https://www.nxtbook.com/ifai/geosynthetics/0418GS
https://www.nxtbook.com/ifai/geosynthetics/0218GS
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