HomeMy WebLinkAbout039-023-122This set of'plans and s
kept on the job at all timap acificatio S bE /
make any changes or alt
out written ations on sa
�'ublic Works,
from the �p m
orlcs, County of tw \2p-
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This set of plans and specifications MUST be
kept on the job at all times and it is unlawful to
make any changes or alterations on same with-
out written permission from the Department of �--
Public Works, County of Butte.
e)
NOTE:—=All Materials & Workmanship Shall Be in
l \ Accordance wif•h Recognized Good Practices and
of a quality prescribed for the Specified use in the
the Uniform. Building, Plumbing & Mechanical Codes and
A opertY � of 5 ft. ft \ the NatioW Electrical C«k6
property lines and a etback of 1
5o ft. from.the road 1 � ,� L_
centerline shall be cldar of \�
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0-0-
C1
MANUFACTURING
The swimming pool is of one-piece fiberglass reinforced plastic (F.R.P.)
construction, factory formed over a shaped mold. The steps are formed into the
pool at the end. These steps are textured for a non-skid surface, also the
majority of the entire bottom of the pool is textured for a non-skid surface.
The F.R.P. laminate is constructed in the following manner. (Note: The "mold”
is the exact shape, size and finish of the pool but in reverse. The manufactur-
ing process we are describing is reverse of normal processing: i.e. first polish,
then paint, then the main body; usually items are built, then painted, then
polished. The F.R.P. pool is made upside down, inside out, and backward.)
1. The mold is polished, wax is applied and polished by hand; a film of P.V.A.
(polyvinyl alcohol) green in color and water soluable, is sprayed onto
the entire surface, this is to assure separation of the F.R.P. pool and
the mold.
2. A "gel coat” formula and N.P.G. resin (neo pentyl glycol, a corrosion
resistant resin) is catalized with M.E.K.P. (methyl ethyl ketane peroxide)
is sprayed over the entire mold surface to approximately 25 mill thickness
and allowed to harden.
3. F.R.P. is applied over the gel coat at approximately 1/8" thickness, all
air bubbles are worked out and this is then allowed to harden. The fiber-
glass is random strands in various lengths and the plastic is isophalic
resin, the ratio is approximately 40% fiberglass, 60% plastic resin,
catalyst is M.E.K.P.
4. F.R.P. is again applied to repeat Step #3, for a total thickness of
approximately 1/4".
5. Particle board is placed in the perimeter of the coping. F.R.P. is applied
as in step #3 and 4, but only over the particle board and an inch or two
of the pool to complete the beam structure in the coping.
Twelve inch lengths of 3/8" chains are now placed upon the under sides
of the coping every 8 inches on each side and Steps #3 and 4 are repeated
to a total thickness of approximately 2" around the chains with approxi-
mately 6" exposed for handling the pool at the factory, transporting,
and installation.
6. The F.R.P. surface is now sprayed with a dark pigmented gel coat. This
does enhance the appearance of the pool upon delivery but the reason is
to insure all glass fibers are covered with plastic so the glass; fibers
will not pick up water or moisture, which would deteriorate the laminate
by swelling. The color is only an aid to see the coating is complete.
This is also allowed to harden.
7. Water is then pumped between the surface of the mold and the pigmented
surface of the F.R.P. pool to cause a parting and to initiate lifting.
The pool is lifted from the mold when parting is complete (the F.R.P.
Pool is still upside down).
8. Holes are drilled and cut for the pool fixtures; the fixtures are installed
and sealed with either silicone rubber and gaskets or with heavy laminate.
A small amount of P.V.A. film is left on to protect against dirt abrasion
in transportation. This green P.V.A. film rinses off with water.
INSTALLATION OF THE VIKING POOL
MANUFACTURER'S RECOMMENDATIONS
Excavation for the Pool
The pool excavation is dug very close to the pool size with a :minimum of
disturbance to the unexcavated soil which will support the pool. The clearance
is approximately 6 inches around the pool.
The depth and contour of the excavation is determined with the use of a
transit level and a tape. The bottom of the excavation is overdug 3 inches
to 6 inches.
Preparation of Bottom Surface of Excavation
This surface is prepared by covering it with a 3 - 6 inch layer of bedding
sand or concrete sand, 1/4 minus, may be used.
Setting of the Pool
The pool is delivered to the pool site. A hydraulic crane is present to
pick up the pool and lower it carefully into the excavation.
Levelling the Pool
The qualified pool installers then check the level of the pool and its
fit with the excavation by walking around on the inside of the pool feeling for
any voids that might be present.
The pool is then lifted out of the excavation and set back as many times
as necessary to achieve a perfect fit. The perfect fit is realized by using
the following techniques, namely, raking the surface of the sand in order to
see where the pool is touching after it is removed and also walking around on
the inside of the pool to detect low spots. When the level of the pool is
within one-half inch, the setting procedure is complete.
Water Fill and Sand Backfill
The water is then started into the pool at the same time the sand backfill
is being placed. The backfill and the water inside the pool are kept near the
same level and the level of the pool is checked periodically. Total compaction
of the backfill is accomplished by the constant use of the hand operated tampers
in conjunction with the appropriate amount of water.
Plumbing and Electrical
All plumbing and electrical is done in accordance with all codes in
effect in that area.
When Concrete Decks are Poured
Forms are now put up around the perimeter of the pool. Small sumpts
measuring 12" wide and 6" deep are dug under each chain along the sides of the
pool. This will ensure a bonding or anchoring effect on the sides.
Concrete is then poured coming up to approximately 1/4" of the top of the
coping with a slight fall away from the pool. Cantilever deck may also be used.
Maintenance
This pool is designed to be kept full at all times. The pool shell could
be damaged if the water level is allowed to drop below the pool inlet. When
appreciable draw -down is noticed, or if it becomes necessary to drain the pool,
contact VIKING POOLS, INC., or their agents for instructions.
3'-0" MIN.
913
6" x 6"
SLOPE E v."iFT W x W7.4 l.�
Wire
Mesh
2.o 4"
01 Pill Ty
771
«NAT. GR.
~'y
• J Galvanized 4 (AdobeFor Cla)
on Soil Only
Z Chain Diameter at
• 6 Feet on Center y
• 10r' • 3"Thick Compacted
Sand (Typical)
4" (Min.) Thick Compacted
Gravel for Clay (Adobe)
Soil Only
Fiberglass Pool Shell TYPICAL DETAIL—ALL MODELS
6"
STRENGTH OF THE VIKING'S POOL FIBERGLASS REINFORCED PLASTIC WALL
JUNE 23, 1986
The strength of the pool's walls are investigated for the top surface
of this pool's edge beam geing approximately twenty inches above the ground
as shown below. A one foot wide vertical strip of the pool's wall is treated
as a cantilever beam carrying the lateral loading due to water, the length
of the cantilever is 18 inches. This analysis is conservative since the
lateral retraint offered by the pool's edge beam is neglected. The flexure
stresses are calculated at sect. m -m up to which the pool's wall is
supported by compacted back -fill.
Edge
2„ Beam P - resultant lateral load due to water
on 1 foot wide vertical strip of wall
above sect. m -m.
P = 62.4(18)(18)(1)= 70.2 lb.
2 12 12
Mm -m = 70.2(6) = 421.2 lb.in.
Max flexure stress= 6M = 6(421.2) = 3,370lb/in2
bh2 12(,)2 O.K
Flexural Strength as 21,721 lb/int
P per June 4, 1986 Report
Compacted Pool Wall has an adequate factor of safety
6r7 Back -Fill for above -ground support. r
m m QROf ESS11
� %A�
`` ` i► KENNETH C. LUX
1 � H C.
/a mm. ENGINEER
QJ�'.;j•J�.c"� rn
The above specifications are for models: = EXP•�4-
(
Series ASP, Series B, Series BFF, Series BK, i
Series BL, Series MK and Series SAP. � jV1\-
4F CAl1c�
ENGINEERING REPORT ON THE VIKING FIBERGLASS POOL
-------JUNE -4,-1986--:
This,report deals primarily with the strength and energy absorption
characteristics of the fiberglass polyester material used in the construction
of the Viking Pools. These pools are manufactured by the firm VIKING POOLS,
INC. in Williams, California.
The ability of the pool structure to carry the loads imposed on it (which
are primarily static loads, due to water pressure, ground settling, and dynamic
loads due to earthquakes) depends on the strength and energy absorption quali-
ties of the fiberglass polyester material.
To ascertain the mechanical behavior of the above material, tensile, com-
pressive and flexure specimens were made from material removed from the walls
of existing pools. All of these specimens were tested in the Materials Testing
Laboratory of the University of Santa Clara by Harold M. Tapay, Professor of
Engineering. All of the above tests were conducted at room temperature (78°F)
and 10°F. The tests at 10oF were conducted because some pools are installed
in the mountain areas which reach low temperatures during winter.
From the axial load tests in tension and compression and the flexure tests,
the following mechanical properties were evaluated.
(1) Ultimate strength in tension
(2) Ultimate strength in compression
(3) (a) Modulus of rupture in flexure, i.e. Flexural Strength
(b) Modulus of elasticity in flexure, i.e. Flexural Modulus
The average value of these properties appear in the following table:
Specimen Ultimate Ultimate Flexural Flexural
Temperature Tensile Strength Compressive Strength Strength Modulus
(°F) (lb/in.') (lb/in.') (lb/in.') (lb/in.21
78 15,130 23,360 21,720 1.0 x 106
10 17,070 23,890 24,730 1.2 x 106
From the above table it can be seen that at the lower temperature of 10°F
this fiber reinforced plastic gains in strength and stiffness, and it could
be shown that its capacity to absorb energy has not diminished. Therefore,
this pool is just as good structurally at low temperatures as it is at normal
operating temperatures.
This fiber reinforced plastic is strong, tough and resilient material.
Compared to gunite, this material is stronger under tensile, compressive and
flexural loadings. In addition, the material is much tougher than gunite
(toughness meaning energy absorption capacity up to rupture). A simple beam
of this material with a span of 5" and a depth of approximately 5/16" and a
width of 7/8" experienced a 1/2" midspan deflection under a midspan concentrated
load without rupturing. This means that a pool made of this material could
experience large deflections under earthquake loading without rupturing.
In conclusion, the Viking Pool, when properly installed in compacted ground
against a compacted sand cushion (compacted by wetting) can safely carry the
loads due to water pressure and ground movement, including ground
movement due to earthquakes.
�o QRpf ESSlp
sumCOUNTY
%JW
Kenneth C. Lux .:�j �/� BUILDING ®EPAs;TMEN!T
No. 17809
Exp. APPROVED
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0-0-
C1
MANUFACTURING
The swimming pool is of one-piece fiberglass reinforced plastic (F.R.P.)
construction, factory formed over a shaped mold. The steps are formed into the
pool at the end. These steps are textured for a non-skid surface, also the
majority of the entire bottom of the pool is textured for a non-skid surface.
The F.R.P. laminate is constructed in the following manner. (Note: The "mold”
is the exact shape, size and finish of the pool but in reverse. The manufactur-
ing process we are describing is reverse of normal processing: i.e. first polish,
then paint, then the main body; usually items are built, then painted, then
polished. The F.R.P. pool is made upside down, inside out, and backward.)
1. The mold is polished, wax is applied and polished by hand; a film of P.V.A.
(polyvinyl alcohol) green in color and water soluable, is sprayed onto
the entire surface, this is to assure separation of the F.R.P. pool and
the mold.
2. A "gel coat” formula and N.P.G. resin (neo pentyl glycol, a corrosion
resistant resin) is catalized with M.E.K.P. (methyl ethyl ketane peroxide)
is sprayed over the entire mold surface to approximately 25 mill thickness
and allowed to harden.
3. F.R.P. is applied over the gel coat at approximately 1/8" thickness, all
air bubbles are worked out and this is then allowed to harden. The fiber-
glass is random strands in various lengths and the plastic is isophalic
resin, the ratio is approximately 40% fiberglass, 60% plastic resin,
catalyst is M.E.K.P.
4. F.R.P. is again applied to repeat Step #3, for a total thickness of
approximately 1/4".
5. Particle board is placed in the perimeter of the coping. F.R.P. is applied
as in step #3 and 4, but only over the particle board and an inch or two
of the pool to complete the beam structure in the coping.
Twelve inch lengths of 3/8" chains are now placed upon the under sides
of the coping every 8 inches on each side and Steps #3 and 4 are repeated
to a total thickness of approximately 2" around the chains with approxi-
mately 6" exposed for handling the pool at the factory, transporting,
and installation.
6. The F.R.P. surface is now sprayed with a dark pigmented gel coat. This
does enhance the appearance of the pool upon delivery but the reason is
to insure all glass fibers are covered with plastic so the glass; fibers
will not pick up water or moisture, which would deteriorate the laminate
by swelling. The color is only an aid to see the coating is complete.
This is also allowed to harden.
7. Water is then pumped between the surface of the mold and the pigmented
surface of the F.R.P. pool to cause a parting and to initiate lifting.
The pool is lifted from the mold when parting is complete (the F.R.P.
Pool is still upside down).
8. Holes are drilled and cut for the pool fixtures; the fixtures are installed
and sealed with either silicone rubber and gaskets or with heavy laminate.
A small amount of P.V.A. film is left on to protect against dirt abrasion
in transportation. This green P.V.A. film rinses off with water.
INSTALLATION OF THE VIKING POOL
MANUFACTURER'S RECOMMENDATIONS
Excavation for the Pool
The pool excavation is dug very close to the pool size with a :minimum of
disturbance to the unexcavated soil which will support the pool. The clearance
is approximately 6 inches around the pool.
The depth and contour of the excavation is determined with the use of a
transit level and a tape. The bottom of the excavation is overdug 3 inches
to 6 inches.
Preparation of Bottom Surface of Excavation
This surface is prepared by covering it with a 3 - 6 inch layer of bedding
sand or concrete sand, 1/4 minus, may be used.
Setting of the Pool
The pool is delivered to the pool site. A hydraulic crane is present to
pick up the pool and lower it carefully into the excavation.
Levelling the Pool
The qualified pool installers then check the level of the pool and its
fit with the excavation by walking around on the inside of the pool feeling for
any voids that might be present.
The pool is then lifted out of the excavation and set back as many times
as necessary to achieve a perfect fit. The perfect fit is realized by using
the following techniques, namely, raking the surface of the sand in order to
see where the pool is touching after it is removed and also walking around on
the inside of the pool to detect low spots. When the level of the pool is
within one-half inch, the setting procedure is complete.
Water Fill and Sand Backfill
The water is then started into the pool at the same time the sand backfill
is being placed. The backfill and the water inside the pool are kept near the
same level and the level of the pool is checked periodically. Total compaction
of the backfill is accomplished by the constant use of the hand operated tampers
in conjunction with the appropriate amount of water.
Plumbing and Electrical
All plumbing and electrical is done in accordance with all codes in
effect in that area.
When Concrete Decks are Poured
Forms are now put up around the perimeter of the pool. Small sumpts
measuring 12" wide and 6" deep are dug under each chain along the sides of the
pool. This will ensure a bonding or anchoring effect on the sides.
Concrete is then poured coming up to approximately 1/4" of the top of the
coping with a slight fall away from the pool. Cantilever deck may also be used.
Maintenance
This pool is designed to be kept full at all times. The pool shell could
be damaged if the water level is allowed to drop below the pool inlet. When
appreciable draw -down is noticed, or if it becomes necessary to drain the pool,
contact VIKING POOLS, INC., or their agents for instructions.
3'-0" MIN.
913
6" x 6"
SLOPE E v."iFT W x W7.4 l.�
Wire
Mesh
2.o 4"
01 Pill Ty
771
«NAT. GR.
~'y
• J Galvanized 4 (AdobeFor Cla)
on Soil Only
Z Chain Diameter at
• 6 Feet on Center y
• 10r' • 3"Thick Compacted
Sand (Typical)
4" (Min.) Thick Compacted
Gravel for Clay (Adobe)
Soil Only
Fiberglass Pool Shell TYPICAL DETAIL—ALL MODELS
6"
STRENGTH OF THE VIKING'S POOL FIBERGLASS REINFORCED PLASTIC WALL
JUNE 23, 1986
The strength of the pool's walls are investigated for the top surface
of this pool's edge beam geing approximately twenty inches above the ground
as shown below. A one foot wide vertical strip of the pool's wall is treated
as a cantilever beam carrying the lateral loading due to water, the length
of the cantilever is 18 inches. This analysis is conservative since the
lateral retraint offered by the pool's edge beam is neglected. The flexure
stresses are calculated at sect. m -m up to which the pool's wall is
supported by compacted back -fill.
Edge
2„ Beam P - resultant lateral load due to water
on 1 foot wide vertical strip of wall
above sect. m -m.
P = 62.4(18)(18)(1)= 70.2 lb.
2 12 12
Mm -m = 70.2(6) = 421.2 lb.in.
Max flexure stress= 6M = 6(421.2) = 3,370lb/in2
bh2 12(,)2 O.K
Flexural Strength as 21,721 lb/int
P per June 4, 1986 Report
Compacted Pool Wall has an adequate factor of safety
6r7 Back -Fill for above -ground support. r
m m QROf ESS11
� %A�
`` ` i► KENNETH C. LUX
1 � H C.
/a mm. ENGINEER
QJ�'.;j•J�.c"� rn
The above specifications are for models: = EXP•�4-
(
Series ASP, Series B, Series BFF, Series BK, i
Series BL, Series MK and Series SAP. � jV1\-
4F CAl1c�
ENGINEERING REPORT ON THE VIKING FIBERGLASS POOL
-------JUNE -4,-1986--:
This,report deals primarily with the strength and energy absorption
characteristics of the fiberglass polyester material used in the construction
of the Viking Pools. These pools are manufactured by the firm VIKING POOLS,
INC. in Williams, California.
The ability of the pool structure to carry the loads imposed on it (which
are primarily static loads, due to water pressure, ground settling, and dynamic
loads due to earthquakes) depends on the strength and energy absorption quali-
ties of the fiberglass polyester material.
To ascertain the mechanical behavior of the above material, tensile, com-
pressive and flexure specimens were made from material removed from the walls
of existing pools. All of these specimens were tested in the Materials Testing
Laboratory of the University of Santa Clara by Harold M. Tapay, Professor of
Engineering. All of the above tests were conducted at room temperature (78°F)
and 10°F. The tests at 10oF were conducted because some pools are installed
in the mountain areas which reach low temperatures during winter.
From the axial load tests in tension and compression and the flexure tests,
the following mechanical properties were evaluated.
(1) Ultimate strength in tension
(2) Ultimate strength in compression
(3) (a) Modulus of rupture in flexure, i.e. Flexural Strength
(b) Modulus of elasticity in flexure, i.e. Flexural Modulus
The average value of these properties appear in the following table:
Specimen Ultimate Ultimate Flexural Flexural
Temperature Tensile Strength Compressive Strength Strength Modulus
(°F) (lb/in.') (lb/in.') (lb/in.') (lb/in.21
78 15,130 23,360 21,720 1.0 x 106
10 17,070 23,890 24,730 1.2 x 106
From the above table it can be seen that at the lower temperature of 10°F
this fiber reinforced plastic gains in strength and stiffness, and it could
be shown that its capacity to absorb energy has not diminished. Therefore,
this pool is just as good structurally at low temperatures as it is at normal
operating temperatures.
This fiber reinforced plastic is strong, tough and resilient material.
Compared to gunite, this material is stronger under tensile, compressive and
flexural loadings. In addition, the material is much tougher than gunite
(toughness meaning energy absorption capacity up to rupture). A simple beam
of this material with a span of 5" and a depth of approximately 5/16" and a
width of 7/8" experienced a 1/2" midspan deflection under a midspan concentrated
load without rupturing. This means that a pool made of this material could
experience large deflections under earthquake loading without rupturing.
In conclusion, the Viking Pool, when properly installed in compacted ground
against a compacted sand cushion (compacted by wetting) can safely carry the
loads due to water pressure and ground movement, including ground
movement due to earthquakes.
�o QRpf ESSlp
sumCOUNTY
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Kenneth C. Lux .:�j �/� BUILDING ®EPAs;TMEN!T
No. 17809
Exp. APPROVED
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MANUFACTURING
The swimming pool is of one-piece fiberglass reinforced plastic (F.R.P.)
construction, factory formed over a shaped mold. The steps are formed into the
pool at the end. These steps are textured for a non-skid surface, also the
majority of the entire bottom of the pool is textured for a non-skid surface.
The F.R.P. laminate is constructed in the following manner. (Note: The "mold”
is the exact shape, size and finish of the pool but in reverse. The manufactur-
ing process we are describing is reverse of normal processing: i.e. first polish,
then paint, then the main body; usually items are built, then painted, then
polished. The F.R.P. pool is made upside down, inside out, and backward.)
1. The mold is polished, wax is applied and polished by hand; a film of P.V.A.
(polyvinyl alcohol) green in color and water soluable, is sprayed onto
the entire surface, this is to assure separation of the F.R.P. pool and
the mold.
2. A "gel coat” formula and N.P.G. resin (neo pentyl glycol, a corrosion
resistant resin) is catalized with M.E.K.P. (methyl ethyl ketane peroxide)
is sprayed over the entire mold surface to approximately 25 mill thickness
and allowed to harden.
3. F.R.P. is applied over the gel coat at approximately 1/8" thickness, all
air bubbles are worked out and this is then allowed to harden. The fiber-
glass is random strands in various lengths and the plastic is isophalic
resin, the ratio is approximately 40% fiberglass, 60% plastic resin,
catalyst is M.E.K.P.
4. F.R.P. is again applied to repeat Step #3, for a total thickness of
approximately 1/4".
5. Particle board is placed in the perimeter of the coping. F.R.P. is applied
as in step #3 and 4, but only over the particle board and an inch or two
of the pool to complete the beam structure in the coping.
Twelve inch lengths of 3/8" chains are now placed upon the under sides
of the coping every 8 inches on each side and Steps #3 and 4 are repeated
to a total thickness of approximately 2" around the chains with approxi-
mately 6" exposed for handling the pool at the factory, transporting,
and installation.
6. The F.R.P. surface is now sprayed with a dark pigmented gel coat. This
does enhance the appearance of the pool upon delivery but the reason is
to insure all glass fibers are covered with plastic so the glass; fibers
will not pick up water or moisture, which would deteriorate the laminate
by swelling. The color is only an aid to see the coating is complete.
This is also allowed to harden.
7. Water is then pumped between the surface of the mold and the pigmented
surface of the F.R.P. pool to cause a parting and to initiate lifting.
The pool is lifted from the mold when parting is complete (the F.R.P.
Pool is still upside down).
8. Holes are drilled and cut for the pool fixtures; the fixtures are installed
and sealed with either silicone rubber and gaskets or with heavy laminate.
A small amount of P.V.A. film is left on to protect against dirt abrasion
in transportation. This green P.V.A. film rinses off with water.
INSTALLATION OF THE VIKING POOL
MANUFACTURER'S RECOMMENDATIONS
Excavation for the Pool
The pool excavation is dug very close to the pool size with a :minimum of
disturbance to the unexcavated soil which will support the pool. The clearance
is approximately 6 inches around the pool.
The depth and contour of the excavation is determined with the use of a
transit level and a tape. The bottom of the excavation is overdug 3 inches
to 6 inches.
Preparation of Bottom Surface of Excavation
This surface is prepared by covering it with a 3 - 6 inch layer of bedding
sand or concrete sand, 1/4 minus, may be used.
Setting of the Pool
The pool is delivered to the pool site. A hydraulic crane is present to
pick up the pool and lower it carefully into the excavation.
Levelling the Pool
The qualified pool installers then check the level of the pool and its
fit with the excavation by walking around on the inside of the pool feeling for
any voids that might be present.
The pool is then lifted out of the excavation and set back as many times
as necessary to achieve a perfect fit. The perfect fit is realized by using
the following techniques, namely, raking the surface of the sand in order to
see where the pool is touching after it is removed and also walking around on
the inside of the pool to detect low spots. When the level of the pool is
within one-half inch, the setting procedure is complete.
Water Fill and Sand Backfill
The water is then started into the pool at the same time the sand backfill
is being placed. The backfill and the water inside the pool are kept near the
same level and the level of the pool is checked periodically. Total compaction
of the backfill is accomplished by the constant use of the hand operated tampers
in conjunction with the appropriate amount of water.
Plumbing and Electrical
All plumbing and electrical is done in accordance with all codes in
effect in that area.
When Concrete Decks are Poured
Forms are now put up around the perimeter of the pool. Small sumpts
measuring 12" wide and 6" deep are dug under each chain along the sides of the
pool. This will ensure a bonding or anchoring effect on the sides.
Concrete is then poured coming up to approximately 1/4" of the top of the
coping with a slight fall away from the pool. Cantilever deck may also be used.
Maintenance
This pool is designed to be kept full at all times. The pool shell could
be damaged if the water level is allowed to drop below the pool inlet. When
appreciable draw -down is noticed, or if it becomes necessary to drain the pool,
contact VIKING POOLS, INC., or their agents for instructions.
3'-0" MIN.
913
6" x 6"
SLOPE E v."iFT W x W7.4 l.�
Wire
Mesh
2.o 4"
01 Pill Ty
771
«NAT. GR.
~'y
• J Galvanized 4 (AdobeFor Cla)
on Soil Only
Z Chain Diameter at
• 6 Feet on Center y
• 10r' • 3"Thick Compacted
Sand (Typical)
4" (Min.) Thick Compacted
Gravel for Clay (Adobe)
Soil Only
Fiberglass Pool Shell TYPICAL DETAIL—ALL MODELS
6"
STRENGTH OF THE VIKING'S POOL FIBERGLASS REINFORCED PLASTIC WALL
JUNE 23, 1986
The strength of the pool's walls are investigated for the top surface
of this pool's edge beam geing approximately twenty inches above the ground
as shown below. A one foot wide vertical strip of the pool's wall is treated
as a cantilever beam carrying the lateral loading due to water, the length
of the cantilever is 18 inches. This analysis is conservative since the
lateral retraint offered by the pool's edge beam is neglected. The flexure
stresses are calculated at sect. m -m up to which the pool's wall is
supported by compacted back -fill.
Edge
2„ Beam P - resultant lateral load due to water
on 1 foot wide vertical strip of wall
above sect. m -m.
P = 62.4(18)(18)(1)= 70.2 lb.
2 12 12
Mm -m = 70.2(6) = 421.2 lb.in.
Max flexure stress= 6M = 6(421.2) = 3,370lb/in2
bh2 12(,)2 O.K
Flexural Strength as 21,721 lb/int
P per June 4, 1986 Report
Compacted Pool Wall has an adequate factor of safety
6r7 Back -Fill for above -ground support. r
m m QROf ESS11
� %A�
`` ` i► KENNETH C. LUX
1 � H C.
/a mm. ENGINEER
QJ�'.;j•J�.c"� rn
The above specifications are for models: = EXP•�4-
(
Series ASP, Series B, Series BFF, Series BK, i
Series BL, Series MK and Series SAP. � jV1\-
4F CAl1c�
ENGINEERING REPORT ON THE VIKING FIBERGLASS POOL
-------JUNE -4,-1986--:
This,report deals primarily with the strength and energy absorption
characteristics of the fiberglass polyester material used in the construction
of the Viking Pools. These pools are manufactured by the firm VIKING POOLS,
INC. in Williams, California.
The ability of the pool structure to carry the loads imposed on it (which
are primarily static loads, due to water pressure, ground settling, and dynamic
loads due to earthquakes) depends on the strength and energy absorption quali-
ties of the fiberglass polyester material.
To ascertain the mechanical behavior of the above material, tensile, com-
pressive and flexure specimens were made from material removed from the walls
of existing pools. All of these specimens were tested in the Materials Testing
Laboratory of the University of Santa Clara by Harold M. Tapay, Professor of
Engineering. All of the above tests were conducted at room temperature (78°F)
and 10°F. The tests at 10oF were conducted because some pools are installed
in the mountain areas which reach low temperatures during winter.
From the axial load tests in tension and compression and the flexure tests,
the following mechanical properties were evaluated.
(1) Ultimate strength in tension
(2) Ultimate strength in compression
(3) (a) Modulus of rupture in flexure, i.e. Flexural Strength
(b) Modulus of elasticity in flexure, i.e. Flexural Modulus
The average value of these properties appear in the following table:
Specimen Ultimate Ultimate Flexural Flexural
Temperature Tensile Strength Compressive Strength Strength Modulus
(°F) (lb/in.') (lb/in.') (lb/in.') (lb/in.21
78 15,130 23,360 21,720 1.0 x 106
10 17,070 23,890 24,730 1.2 x 106
From the above table it can be seen that at the lower temperature of 10°F
this fiber reinforced plastic gains in strength and stiffness, and it could
be shown that its capacity to absorb energy has not diminished. Therefore,
this pool is just as good structurally at low temperatures as it is at normal
operating temperatures.
This fiber reinforced plastic is strong, tough and resilient material.
Compared to gunite, this material is stronger under tensile, compressive and
flexural loadings. In addition, the material is much tougher than gunite
(toughness meaning energy absorption capacity up to rupture). A simple beam
of this material with a span of 5" and a depth of approximately 5/16" and a
width of 7/8" experienced a 1/2" midspan deflection under a midspan concentrated
load without rupturing. This means that a pool made of this material could
experience large deflections under earthquake loading without rupturing.
In conclusion, the Viking Pool, when properly installed in compacted ground
against a compacted sand cushion (compacted by wetting) can safely carry the
loads due to water pressure and ground movement, including ground
movement due to earthquakes.
�o QRpf ESSlp
sumCOUNTY
%JW
Kenneth C. Lux .:�j �/� BUILDING ®EPAs;TMEN!T
No. 17809
Exp. APPROVED
slgT�tvl
F C. / ��