pinawa heritage sundial

8/3/2019 Pinawa Heritage Sundial

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A Local Government District of

Pinawa Millennium Project

Grand Unveiling – July 14,2001



Pinawa – A great place to live!



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.



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.




INNER DIAL • Zonal Solar Time: local

apparent time with a

longitude correction butwithout correction for theEquation of Time.


• Results in an hour line shiftof ~23.5 minutes earlier.

• Indicates Daylight SavingTime.



Design – Getting Started

• Determine latitude andlongitude of the dial centre.


• 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.




• 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).





• 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



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.



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!




• 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.




• ~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.




• 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.



Construction – Dial Plate

• Our sign!

• 1999 - Just a flat vacant piece of

land.




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




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.




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.



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.



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



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.



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.




Gnomonconstruction inthe machineshop.

The gnomon is welded andready for sandblasting. (plugwelded images, hand forged

1”x3” trim)




The gnomon is being removedfrom the shop for sandblasting.

The sandblasting process. • Medium grade silica sand. • Portable sandblaster/diesel

compressor.




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.




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.




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.




“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




• 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.



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.




• 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.




• 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.



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.



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.



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.




• Glaciation • Glacial Lake Agassiz • First Peoples:

Introduction of StoneTools

• First Peoples:Introduction of New

Technologies • The Coming of the

Europeans: Voyageur FurTraders




• Industry-Agriculture,Forestry and Mining

• Modern Transportation-

Rail, Air and Road • Development of the

Winnipeg River-”OldPinawa”

•Further Development ofthe Winnipeg River




• Whiteshell ProvincialPark

• Wildlife •

Research & Development-Atomic Energy ofCanada Limited

• The Day Sky •

The Night Sky • The Earth and Sun



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.



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.




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.




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.




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.




The last piece of granite!

The rails have been positionedand the sand bed is ready for theremaining tiles.




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.




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!




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.




Each hour marker is unique.

Each 15 minute interval is marked

with a brass button set into thegrey pavers.



The Sundial

“TIME TO

CELEBRATE”



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.



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



Web Site

Web site: For more information about our sundial pleasevisit: www.mts.net/~sabanski/sundial/sundial.htm

pinawa heritage sundial

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