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NewObsConstruction
Submitted by
Paul Valleli
on 06/16/2008 12:32:34
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LX200R and Engine Hoist Hoist cost $149 at PepBoys Auto in Nashua
Submitted by
Paul Valleli
on 06/16/2008 12:34:04
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Materials for 10X10 Obs. The existing concrete pad and pier are reused and a new building permit was not required
Submitted by
Paul Valleli
on 06/16/2008 12:35:43
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One of two white pines sacrificed to get 45 deg. horizon
Submitted by
Paul Valleli
on 06/16/2008 12:41:28
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Chase Felling 25-inch diam. Pine
Submitted by
Paul Valleli
on 06/16/2008 12:42:12
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LX200R on LeSeur Equatorial Wedge& XHD Tripod
Submitted by
Paul Valleli
on 06/16/2008 12:44:06
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Ring Panels 4X8 X 2 panels for Dome support rings 84-inch ID, 94-inch OD
Submitted by
Paul Valleli
on 06/16/2008 12:47:30
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Dome Rings ready for attachment to roof support structure
Submitted by
Paul Valleli
on 06/16/2008 12:50:37
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Installing the guide channel for the rollers
Submitted by
Paul Valleli
on 06/16/2008 12:52:35
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Old concrete pad and pier from roll-off metal shed Obs.
Submitted by
Paul Valleli
on 06/16/2008 12:54:21
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North and South Wall frames up
Submitted by
Paul Valleli
on 06/16/2008 12:56:23
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Reinforced Roof Beams While no building permit required for 10 X 10 building, building inspector suggested doubling up 2 X 10's for heavy winter snow loads
Submitted by
Paul Valleli
on 06/16/2008 12:59:03
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Roller Bearing Pair - one of ten sets, adjustable
Submitted by
Paul Valleli
on 06/16/2008 13:00:26
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South Wall erected and studded Galvanized Simpson steel support hanger construction throughout and ceramic coated square-drive screws. No nails used.
Submitted by
Paul Valleli
on 06/16/2008 13:02:49
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Equipment Bay Extension Existing pier was offset by 2 ft. in concrete pad so dome also had to be offset. This required an offset to the roof structure to center the dome on the pier. The extra space will be used for computer equipment and automation gear.
Submitted by
Paul Valleli
on 06/16/2008 13:06:34
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John Reed and Paul Valleli - dome ring is mounted in place
Submitted by
Paul Valleli
on 06/16/2008 13:08:05
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Studding North wall
Submitted by
Paul Valleli
on 06/16/2008 13:13:12
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Dome Ring ready for attachment to roof support
Submitted by
Paul Valleli
on 06/16/2008 13:14:22
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Roof Panels clamps to Dome Ring using nylon ratchet slings
Submitted by
Paul Valleli
on 06/16/2008 13:16:30
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John Reed and T-beam Crane beam was fastened to the engine hoist and a temporary floor made using 4X8 pressure treated panels.
Submitted by
Paul Valleli
on 06/16/2008 13:20:34
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Crane Height test
Submitted by
Paul Valleli
on 06/16/2008 13:21:16
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Crane offset position test
Submitted by
Paul Valleli
on 06/16/2008 13:22:28
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PLAN "A" - crane under dome load FEA said we were at 7500 psi, beyond the elastic limit but not at the 10,000 psi rupture strength of spruce construction - no safety factor left
Submitted by
Paul Valleli
on 06/16/2008 13:26:28
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Plane A crane failing due to frame twist and excessive bending
Submitted by
Paul Valleli
on 06/16/2008 13:28:08
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Dome lift attempt #2 after adding third 2X4 to the T-beam Frame began twisting again because of play in the engine hoist
Submitted by
Paul Valleli
on 06/16/2008 13:30:50
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Beam support reinforcement for attempt #2 lift cancelled because beam bending was again excessive.
Submitted by
Paul Valleli
on 06/16/2008 13:32:32
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Reinforcing the double T-beam support frame
Submitted by
Paul Valleli
on 06/16/2008 13:33:45
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Plan "B" - an inclined plane made of 2X10's Russel Porter and STM members used timbers to slide the heavy steel dome ring up onto the concrete base.
Plan C would be a gantry
Plan D would be to round up 6 or 8 ATM "monkeys" to lift the dome over the walls.
Submitted by
Paul Valleli
on 06/16/2008 13:39:23
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Dome moved to rear ( East) of the Obs. building only two people needed to lift 200 pound dome in short moves
Submitted by
Paul Valleli
on 06/16/2008 13:42:29
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Chase green finishing sawhorse and ramp structure steel sawhorses rated at 1200 lbs. apiece reduce the amount of lift on the ramp required by two feet.
Submitted by
Paul Valleli
on 06/16/2008 13:45:07
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Stiffeners were added to interior of dome to reduce stretching of the plastic
Submitted by
Paul Valleli
on 06/16/2008 13:46:17
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Rif with the A-frame roller and cable guide
Submitted by
Paul Valleli
on 06/16/2008 13:47:24
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Dome placed at base of the incline
Submitted by
Paul Valleli
on 06/16/2008 13:48:35
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Nylon strap wrapped around dome and attached to steel cable
Submitted by
Paul Valleli
on 06/16/2008 13:51:09
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Dome halfway up ramp
Submitted by
Paul Valleli
on 06/16/2008 13:52:06
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12 volt Jeep 2000 lb. winch attached to the pier Winch cable passes through pulley on west wall A-frame, then to roller on east wall and down ramp to dome sling.
Submitted by
Paul Valleli
on 06/16/2008 13:55:53
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Dome halfway up the ramp
Submitted by
Paul Valleli
on 06/16/2008 13:57:00
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Dome halfway up the ramp
Submitted by
Paul Valleli
on 06/16/2008 13:57:35
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Dome halfway up ramp Paul is ready to lower the roller so the dome can teeter onto the horizontal 2X4 guide rails on top of the dome ring.
Submitted by
Paul Valleli
on 06/16/2008 14:00:04
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Dome going over the hump
Submitted by
Paul Valleli
on 06/16/2008 14:00:59
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Dome at top of ramp on horizontal skids
Submitted by
Paul Valleli
on 06/16/2008 14:02:16
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Paul with A-frame cable guides guides were only needed for about two minutes of hoisting
Submitted by
Paul Valleli
on 06/16/2008 14:04:53
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Dome almost over the rollers
Submitted by
Paul Valleli
on 06/16/2008 14:06:09
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Chase checks out placement of rollers
Submitted by
Paul Valleli
on 06/16/2008 14:08:34
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Ta-Da ! no more rain problems now flooring, vinyl siding, sliding doors, wiring, dome drive motor, and hardware can be installed. June 15, 2008
Submitted by
Paul Valleli
on 06/16/2008 14:16:04
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Polypropylene corner Roof Panels The panels are secured to the dome ring and fastened to the roof structure.
The material is resistant to UV and weathering.
Submitted by
Paul Valleli
on 06/19/2008 01:17:38
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