Design of

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Design of Fiberglass Reinforced Polymer Mortar
Manholes for Zero II
HWEA Annual Conference Honolulu February 2007
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THE PROBLEM
Decaying concrete due to exposure to Hydrogen
Sulfide and wastewater gases.
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THE PROBLEM
Hard to maintain locations!!!
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Together, L.F. Manufacturing, Inc. and Hobas
Pipe, USA offer a variety of non-corrosive
fiberglass products designed for wastewater and
industrial systems including manholes, pipe,
fittings, wetwells, rehab products and more.
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Introduction
L.F. Manufacturing, Inc. Giddings,
Texas Fiberglass Reinforced Polyester
(FRP) Manholes Wetwells
Hobas Pipe USA Houston, Texas Centrifugal Cast
Fiberglass Reinforced Polymer Mortar Pipe
(CCFRPM)
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Company Profiles
LFM and Hobas Pipe are industry leaders in the
manufacture of non-corrosive fiberglass pipe and
fittings.
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Company Profiles
LFM began manufacturing fiberglass manholes in
Beaumont, Texas in 1982 under the name of LeBlanc
Fiberglass. In 1986, the company was re-located
to Giddings, Texas, where current operations
include six production facilities.
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Company Profiles
Hobas Pipe USA is a Licensee of HOBAS Engineering
AG of Switzerland with manufacturing locations
worldwide. The Houston plant began operation in
1987.
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Company Profiles
Together, the companies combine over 40 years of
manufacturing fiberglass pipe and fiberglass
products in the United States with installations
throughout the world.
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Products
Hobas Centrifugal Cast Fiberglass Reinforced
Polymer Mortar Pipe
Hobas FWC Couplings, Tees Fittings
LFM Fiberglass Manholes Risers
LFM Fiberglass Wetwells
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Hobas Pipe

• Hobas Centrifugal Cast Fiberglass Reinforced
  Polymer Mortar Pipe CCFRPM
• Hobas Pipe USA manufactures CCFRPM Pipe for use
  in many service applications including Gravity
  Sewers, Sewer Force Mains, Industrial Effluents,
  Storm Sewers and more.
• Hobas Pipe can be used in the following service
  conditions
• Operating Pressures up to 250 psi
• Temperatures up to 180 degrees F
• Cover Depths to 50 Feet
• Full Vacuum

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Hobas Pipe
HOBAS (CCFRPM) Pipes are centrifugally cast,
glass-fiber-reinforced, polymer mortar. These
large diameter pipes are ideally suited for
nearly all corrosive piping applications. HOBAS
pipes may be installed in a variety of
installation methods.
HOBAS pipes can be economically designed for
non-pressure and pressure service by varying the
quantity, placement, and orientation of the
glass-fiber reinforcements.
Glass
Resin
Sand
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Hobas Pipe
Large diameter fiberglass pipes from 18 inch to
110 inch diameter are available. Lengths up to
20 feet can be manufactured.
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Hobas Pipe
Hobas Pipe can be designed for the following
installation methods Direct Bury Sliplining
Microtunneling
Jacking Above Ground
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Hobas USA manufactures couplings and fittings
from high quality materials. The FWC coupling
is a structural filament wound coupling with a
watertight EPDM membrane.
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Products
Each joint of Hobas pipe includes a factory
assembled FWC coupling on one end for efficient
installation of pipe sections.
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Hobas FWC Couplings are designed per the
requirements of ASTM D4161. They offer reliable
performance and zero leakage and are design for
the following installation services Di
rect bury Above ground Pressure
relining
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Hobas Fittings
Hobas USA offers many fiberglass pipe fittings to
join Hobas fiberglass pipe including Concentri
c Eccentric Reducers Flanges Wyes Mit
ered Sections Tees
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Products
Lateral Service Connections can be made using a
gasketed PVC Hub with a Stainless Steel Band
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Hobas Tees
PVC pipe connections can be laminated into Hobas
Tee Sections using fiberglass lay-up.
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L.F. Manufacturing has been building quality
fiberglass reinforced manholes, manhole liners,
wetwells and wetwell liners since 1982 utilizing
chop and filament winding equipment.
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Products
L.F. Manufacturing offers fiberglass manholes
from 24 inch diameter through 14 foot diameter.
Depths up to 40 foot are available. Greater
depths can be custom fabricated.
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Monolithic or sectional manholes can be custom
fabricated with a variety of pipe connections
including PVC or FRP Stubouts Flexible
Boots Inserta Tee Fittings
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Products
Fiberglass manholes by LFM are designed and
manufactured to meet or exceed all ASTM D3753
standard specifications. In addition to
complying with all ASTM standards, our fiberglass
manholes carry an H-20 load rating. LFMs
products are engineered to provide you with long
and trouble-free service.
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Fiberglass manholes by LFM are an excellent
economical value. Our fiberglass manholes are
light-weight, greatly reducing delivery and
installation costs. Due to the non-corrosive
nature of LFM's fiberglass manholes, repair
and replacement costs are reduced as well.
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Advantage
Together, L.F. Manufacturing and Hobas Pipe USA
have developed a complete pipe to manhole system
using Hobas pipe and LFM fiberglass manholes.
Years of expertise and engineering knowledge make
LFM and Hobas an excellent choice when specifying
a complete system.
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Advantage
LFM and Hobas USA offer three basic types of
manhole and pipe packages LFM Saddle Type
Risers on Hobas Pipe Tees LFM Watertight
Manholes with Hobas Pipe Stubouts LFM Risers
with FWC Couplings on Hobas Pipe Tees
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Design Option

LFM Saddle Type Manhole on Hobas Pipe
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Design Option
LFM Saddle Type Manhole on Hobas Pipe
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Advantages
Sectional design allows for faster
installation. Pipe to pipe connection. Hobas
Pipe with FWC Couplings allow for watertight
connection and continuous flow. LFM riser with
monolithic cone section transitions to fit the
manhole ring and cover. Field proven
design. Optimal for 48 diameter greater pipe
sizes.

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Design Option

Watertight Manhole
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Advantages
Monolithic design is easy to transport and
install. Pipe to pipe connection. Hobas Pipe
with FWC Couplings and LFM fiberglass inverts
allow for watertight connection and continuous
flow. LFM riser with monolithic cone section
transitions to fit the manhole ring and
cover. Field proven design. Optimal for pipe
diameters less than 48.

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Design Option

Fiberglass Riser w/ FWC Coupling
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Advantages
Sectional design allows for faster pipe
installation. Riser connects to Hobas Tee Base
section with watertight FWC Coupling. Continuous
flow through Hobas Pipe and Tee sections. LFM
riser with monolithic cone section transitions to
fit ring and cover. Field proven design.

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Quality Assurance
Both LFM Hobas Pipe are committed to providing
the highest quality fiberglass products.

Each company incorporates comprehensive in-plant
testing and quality control programs. This
insures complete and consistent workmanship.
Testing procedures include wall thickness
reports, raw material analysis, continuous
chemical analysis, stiffness testing, deflection
characteristics and mechanical properties tests.
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Quality Assurance
Commitment to providing fast dependable service
from design to delivery is a priority. Dedicated
field service technicians. In-house CAD
departments. Machine and computer controlled
manufacturing processes.
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Photo Gallery
LFM Saddle Type Riser on 72 Diameter Hobas
Pipe Tacoma, WA, 2003

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Photo Gallery

Hobas Direct Bury Pipe Las Vegas, NV
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Photo Gallery

Hobas Direct Bury Pipe, Hobas Tee Base with FWC
Coupling.
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Photo Gallery

Load Testing LFM 72 Diameter, 20 Deep
Fiberglass Manhole L.F. Manufacturing Test
Facility.
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Advantage

• Fiberglass Products provide
• Corrosion Resistance
• Long-Life
• Leak-Free Joints
• Structural Reliability
• High Flow Capacity
• Easy Installation
• Lower Life Cycle Cost
• Consistent High Quality
• Superior Service

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Fiberglass Wetwells
When considering fiberglass as a solution for
sanitary sewer manholes and pipe systems, it is a
good time to consider fiberglass as a solution
for wetwells, lift stations and valve
pits. Fiberglass provides long service life and
ease of installation due to leak-free monolithic
construction.

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Advantage

LFM builds fiberglass wetwells to your specified
dimensions with standard diameters from 24
inches through 15 1/2 feet. Depths are
available from 2 feet through 40 feet. Greater
depths can be custom fabricated.
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Fiberglass wetwells can be built complete with
pipe connections for pump discharge, vent,
conduit and inlet lines. This helps decrease
overall installation time.
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Due to the turbulent flow conditions in a pump
station system, LFM recommends that the first
manhole outside of the pump station be
constructed of a non-corrosive durable material
such as fiberglass.
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Fiberglass wetwell and fiberglass manhole ready
to be installed.
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Fiberglass wetwell compete with discharge
connections, conduit connections, drop inlet
connection, vent connection and hatch opening.
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Our fiberglass wetwells are built to meet or
exceed the requirements of ASTM Specification
D3753. LFM strives to supply its customers with
the highest quality fiberglass wetwells available
on the market today.
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The Best Products. The Best Value.
Hobas Pipe, Hobas Couplings, LFM Manhole,
Wetwells More. For more information
contact Hobas Pipe USA in Houston, TX _at_
281-821-2200 or LFM in Giddings, TX _at_
1-800-237-5791
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Bijan Khamanian [phone] bijan_at_hobas.us