pinawa heritage sundial
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8/3/2019 Pinawa Heritage Sundial
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A Local Government District of
Pinawa Millennium Project
Grand Unveiling – July 14,2001
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Pinawa – A great place to live!
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My First Sundial
The sundial was drawn inAutoCAD and a full scaleplot was made. It includes a
noon gap and a graph of theEquation of Time.
The brass dial was made using aphoto-etching technique. Thesundial was raffled to raise funds
for the project.
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Design – Dial Plate
OUTER DIAL • Local Apparent Time: solar
time as derived by the real
sun at any particularlocation.
Latitude: 50°08'48"North Longitude:95°52'31" West
• Symmetrical layout suitedfor the granite tiles.
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Design – Dial Plate
INNER DIAL • Zonal Solar Time: local
apparent time with a
longitude correction butwithout correction for theEquation of Time.
Latitude: 50°08'48"North Longitude:95°52'31" West
• Results in an hour line shiftof ~23.5 minutes earlier.
• Indicates Daylight SavingTime.
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Design – Getting Started
• Determine latitude andlongitude of the dial centre.
Latitude: 50°08'48"North Longitude:95°52'31" West
• Determine hour line angles
relative to noon.
• Establish the true north line.Points to the North Celestial
Pole.• Establish position of the 2
dial centres as a result ofthe wide gnomon – 6
inches.
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Design – Getting Started
• Initial hour line anglescalculated manually.
• Graduated to spreadsheets
for greater accuracy.• Discovered free sundial
design software-ZONWVLAK.
• Software produces a set ofhour lines exportable in dxf(drawing exchange format).
Latitude: 50°08'48"North Longitude:95°52'31" West
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Design – Getting Started
• dxf file used in AutoCAD tocreate all the detaileddrawings.
• Hour line angles measuredin AutoCAD and checkedagainst spreadsheets.
• Layout tables and checks
developed.Latitude: 50°08'48"North Longitude:95°52'31" West
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Construction – Getting Started
• Barrie Burnett-Pinawa’s residenthobby surveyor.
• He established the latitude and
longitude.
• He established true north.
• He surveyed in all the hour line
angles.• He laid out the dial base and
positioned the gnomon.
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Construction – Getting Started
This device was used to confirmthe position of the true north line.
•
At precisely local noon the twoedges of the light band weremarked. True north line found.
• The line was first transposed to
the parking lot and markersestablished.
• Compare to established line. It
was right on!
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Design – Dial Plate
• 38.5’ wide (east-west),40.5’long (north-south), ~1560ft2.• Elevated 18” using ~65 yd3.
of crushed limestone.• Consists of a central
medallion, inner dial andouter dial.
• The central medallion andouter dial are made frompolished granite with
sandblasted images.
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Design – Dial Plate
• ~315 sq. ft. of granite 1.875”thick, 8860 lb.
• The inner dial and borders
are ~ 580 ft2. of red/blackand grey tumbled pavers.
• The hour lines are madefrom used railroad track.
• The 92-15 minute markersare machined from 1/2”diameter brass rod.
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Design – Dial Plate
• 150 ft. of granite blockretaining wall surrounds thedial base.
• Each block is 15 inchessquare and 48 inches long.
• Each block weighs ~1125lb., ~40,000 lb.
• A 6” noon gap corrects for the gnomon width.
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Construction – Dial Plate
• Our sign!
• 1999 - Just a flat vacant piece of
land.
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Construction – Dial Plate
After clearing the organic material4-16” diameter by 16 ft. holes weredrilled for the concrete piles.
4 cages- 1”x10’ threaded rodwelded to 20M rebar for 36’ with10-10” diameter 10M rebar rings
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Construction – Dial Plate
2 piles on the north-south line and2 on the east-west line.
The 18” high base was built usinglimestone and the help of theresidents of the Milner RidgeCorrectional Centre.
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Construction – Dial Plate
The piles with threaded rods forsecuring the gnomon base. The gnomon drainage pipes are
visible.
The 8”x12” hollow steel section is
bolted to the east-west piles.Plywood templates were used forpositioning the holes for thethreaded rods.
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Design - Gnomon• All images were created
by the artists usingAdobe Illustrator.
•
The manufacturerrequired an AutoCADfile for their plasmacutting machine.
• The Adobe dxf (drawingexchange format) filewas not adequate as itused splines for the
curves.
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Design - Gnomon• The entire drawing was
traced using AutoCADwith the appropriatedrawing tools.
• A full scale paper mock-up of the gnomon wasconstructed to check
the design.• The AutoCAD file was
emailed to the supplierand the gnomon was cut
out using 1/2” steel
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Design - Gnomon
• The style height is equalto latitude at the dial’scentre: 50°08'48"
• The gnomon is about 16ft. long and 17.5 ft. high.
• The images cut into the
plate steel reflect thoseillustrated on the graniteicon tiles.
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Construction - Gnomon
12”x 12”, 4”x 8”, 6”x 6”, 3/8”thick hollow steel sectionsform the base of the structure.
Computercontrolledplasma cut 1/2”(1/4”) mild steelplate. 10 pieces
in total.
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Construction - Gnomon
Gnomonconstruction inthe machineshop.
The gnomon is welded andready for sandblasting. (plugwelded images, hand forged
1”x3” trim)
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Construction - Gnomon
The gnomon is being removedfrom the shop for sandblasting.
The sandblasting process. • Medium grade silica sand. • Portable sandblaster/diesel
compressor.
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Construction - Gnomon
Matt grey colour after the millcoating removed. Surface oxidizes rapidly and
uniformly.
The hollow steel section gnomonbase: •
8”x 12” positioned on east – west piles.
• 12” x 12” positioned on north – south piles.
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Construction - Gnomon
The Galion was used to positionthe gnomon on the 12’ x 12’hollow steel section.
The gnomon was not releaseduntil it was secured in position. Itwas able to balance on its owneven before welding.
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Construction - Gnomon
A portable welder was used toattach the gnomon to it’s supportstructure.
Barrie Burnett was set up overone of the reference markers toensure the correct orientation ofthe gnomon.
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Construction - Gnomon
“The Gnomoneers” SteveBerry, Bill Macdonald, ErvinHemminger, Glenn Graham,Carl Sabanski, Clive Schultz
“The Gnomon Erectors” Barrie Burnett, Fred Betker, AlAbraham, Brian Dyck, LeonardScholz, Clive Schultz, Carl
Sabanski
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Construction - Gnomon
• Erected November 1, 2000 • Time capsule placed in
the base. • The oxidization began as
soon as the gnomon wassandblasted and is aunique characteristic of
the structure. It is alwayschanging as the rainpaints new patterns onthe steel.
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Design – Hour Lines
• Donated recycled railroadtrack was used. Made in1934 and weighs 85 lb./yd.
• 225 ft. of rail was usedweighing 6375 lb.
• The track was sandblastedand coated with a clearfinish. This finish was notpermanent and wore awayallowing the rail to oxidize.
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Design – Hour Lines
• Inner dial - 169 ft. of railfrom 7.2 ft. (204 lb.) to 14.3ft. (405 lb.)
• Outer dial – 56 ft. of rail from25 in. (59 lb.) to 7 ft. (198 lb.)
• 92 15-minute markersmachined from 1/2” solid
brass stock were set intoholes drilled in the greypavers.
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Design – Hour Lines
• 16- inner dial hour lines aremarked in Arabic numberssandblasted & painted into
the grey pavers & indicateDaylight Saving Time.
• 15- outer dial hour lines aremarked in Roman numerals
sandblasted and paintedinto large granite stonescollected along the rivershore line.
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Construction – Hour Lines
7- 36 ft. long railroad tracks weredonated. To fit the trailer they hadto be cut into 28 and 8 ft. pieces.
The rails were cut using a bandsaw. A drawing indicated the cutangles and length of both sidesof the rail. The finished railswere within a couple mm of thespecifications.
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Construction – Hour Lines
The rails were sandblasted and aclear seal coat was applied.
The longer rails ready to be
installed. As the rails age and theseal coat wears off the rails areslowly oxidizing.
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Design – Granite Icon Tiles
• 12 icons illustrate thehistory of the EasternManitoba region as well
as well as importantfactors that played arole in the developmentof the region.
• Three additional iconscomplete the dial plate.
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Design – Granite Icon Tiles
• Glaciation • Glacial Lake Agassiz • First Peoples:
Introduction of StoneTools
• First Peoples:Introduction of New
Technologies • The Coming of the
Europeans: Voyageur FurTraders
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Design – Granite Icon Tiles
• Industry-Agriculture,Forestry and Mining
• Modern Transportation-
Rail, Air and Road • Development of the
Winnipeg River-”OldPinawa”
•Further Development ofthe Winnipeg River
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Design – Granite Icon Tiles
• Whiteshell ProvincialPark
• Wildlife •
Research & Development-Atomic Energy ofCanada Limited
• The Day Sky •
The Night Sky • The Earth and Sun
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Construction – Granite Icon Tiles
Sheldon secures a rubber materialthat was applied to all the areasnot to be sandblasted.
Each tile was then sandblasteduntil the artists were satisfied thatit met their requirements.
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Construction – Granite Icon Tiles
Tiles in the process of beingsandblasted.
The last part of the job was topaint the sandblasted areas of allthe tiles and move them to the site.
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Construction – Dial Plate
The central medallion consistingof 4 granite tiles was positionedfirst on a bed of sand.
The pavers for the inner dial werelaid on sand to create onecontinuous field. The sectionsbetween the hour lines do notlook like they have been filled in.
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Construction – Dial Plate
The centre line for each hour linewas surveyed. An offset foundeach edge of the rail. A chalk line
was snapped and the pavers werecut using a cut-off saw.
The pavers are removed for the
rail installation. After the rails areleveled and surveyed intoposition the pavers are put backinto position.
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Construction – Dial Plate
The inner dial is complete: centralmedallion, hour lines, red/blackpavers and grey border pavers.
The outer dial rails are placed intoposition and the granite tilesplaced between them.
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Construction – Dial Plate
The last piece of granite!
The rails have been positionedand the sand bed is ready for theremaining tiles.
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Construction – Dial Plate
The dial plate is there but you stillcan’t tell what time it is unless youare familiar with its layout. The
hour markers still need to be done.
A view of the dial from thenorthwest. The sun is shining andthere is a great shadow.
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Construction – Dial Plate
The granite blocks for the outerwall are installed. Each weighs~1125 lb. and there are 36 of them
– 150 ft.
How do you place and position aheavy granite block? Ice! Youneed a lot of freezer space for120+ blocks of ice. It really works!
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Construction – Dial Plate
The completed retaining wall.
Granite stones are used for the
outer dial hour markers. The innerdial markers are set into thepavers. The noon gap is seen inthis photo.
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Construction – Dial Plate
Each hour marker is unique.
Each 15 minute interval is marked
with a brass button set into thegrey pavers.
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The Sundial
“TIME TO
CELEBRATE”
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The Sundial
A view illustrating many of thecomponents of the sundial.
An excellent shadow. Once the
time is determined on the innerdial all that needs to done is tocorrect for the Equation of Time.Within 5 minutes of clock time.
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The Grand UnveilingLillian Tankard (Culture and Tourism), Culture, Heritage & Tourism Minister Ron Lemieux, MLA Darren Praznik,Liberal Leader Jon Gerrard, Mayor Len Simpson,Resident Administrator Gary Hanna and Cst. Brunet
Mr. Gnomon
July 14, 2001
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Web Site
Web site: For more information about our sundial pleasevisit: www.mts.net/~sabanski/sundial/sundial.htm
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