Prime Dome Construction

Source

• 

https://www.desertdomes.com/rev6calc.html

Length Table

A	Yellow	3.958	47.496
B	Blue	4.638	55.656
C	Red	4.429	53.148
D	Black	4.938	59.256
E	Green	4.562	54.744
F	Orange	4.821	57.852
G	Silver	5.013	60.156
H	Pink	5.243	62.916
I	Brown	5.274	63.288

Side 26.916 29.916 Height 23.30993977 26.30993977

Tools

2 impact drivers, 4 chargers, 6 batteries(previously 2ah but bigger are mote available now) a ratchet, 3 correct size socket 5/8in with 3/8th impact adapter . 2 channel lock style pliers big enough to grab wing nuts. (grabbers)

Bonkers: 8ft 2x4s with little parts of 2x4s with 45 degree angle to prop up the dome to make it so people don't have to hold it all the time. These can fall and could bonk someone if it is not being held, ensure it does not fall on people. Ensure correct length screws were used, or it will have a screw point poke out and hurt someone Bonkers also can move the whole dome causing it to collapse on the last two levels. Make sure they are near vertical

member construction

Drill bit drill cuttoff wheel, measuring tape, press to squish the member ends flat, flap disk or grinder to deburr.

bolt specifications head size uses x socket

5/8 head. no more than .25in shoulder

Labor

A small crew of 3 is normally dedicated to this task. We can expand to 4 on layer 7 and 7 for a portion of layer 9.

It normally takes about 2 days.

Roles

• Impactor on the outside, holds and lifts a bit then has the impact wrench
• pole prepper this person is on the outside and hands poles to the nut holder this person also helps lift
• Nut holder -- this person holds the wing nut with a pair of gloves or channel lock pliars, also keeps things together when a bolt is unlock.

• Pattern Layer, when just 3 people everybody does this laying out a color.

• Lifter, 1 or 2, holds the dome up with bonkers.

It is easier to connect pieces at waste height. so pattern layer will loosly get bolt on a step ahead of the snuggers while there is slack, and then the lifters can align and pull things together at waste height, then weight can also go on the new member right away allowing easier lifting.

Test that the poles swing to the correct location before unscrewing the bolt on the existing layer. this is to avoid moving/adjusting/stretching the dome while it is unbolted.

members can have a lot of tension or compression and may move unexpectedly when the bolt is undone. --So avoid yanking and extra pulling while a section is unbolted.

We order the members so that when we disconnect things the lower ones can come off first. so when we are putting things up the bolt stack is: the ones going to a higher level are closer to the bolt head, and the horizontal ones are closer to the wing nut. then when the next layer gets added

Slack and play is sometimes nice, we go back around and zap the bolts with the impact.

We add tarps before the thing gets too high.

Safety

This may not be a complete list. 

• Ask questions, see something say something.

• We have deburred conduit, but there may still be sharp things.

• Team lift, communication and coordination of the team is important.
• Closed toe shoes recommended
• safety glasses are required.
• rough housing is not allowed.

• hearing protection is required when impacting. Impact drivers are very loud. It is important to have earplugs on strings because they get removed and put back a lot. Communication is easier without

• Do not put yourself under a part of the dome that is propped up.
• Take frequent breaks.
• You may want to wear gloves.
• Drink penty of water.
• Wear sunscreen.
• Have a big brimmed hat.
• snug fitting long sleeve clothes recommended for sun protection
• less flammable (cotton) clothes if using an angle grinder. or cut off

Techniques,

We start at the top and do a layer at a time. We leave the layer finger tight that is being attached to, and impact before it gets too high.

Try not to layout the pattern more than one level ahead.(in a way that confuses the lifters)

As they dome gets heavier, we have to prop up a side of the dome to be able to attach the next layer.

complete Triangles on the base can be used as a support. do not leave a single stick dangling down.

Starting a layer means tipping the dome., prop up desired side about a foot, then extend both sides a foot, then the middle another foot, then the sides another foot then the starting point will be about 3ft up and verify everything is supported.

If the holes do not line up, the dome is warped (or wrong members) do not yank on members when nut is removed.

Management techniques

--  this is all about finesse, make sure the dome is liftend and the change is gradual.

look around and review things. make sure environment is quiet so people can communicate.

Do insist on dewarping the dome and verify by sweeping up the next members tonsee if they line up. if they don't, dewarp the dome until it fits.

3 people -- setter will be going in and out of the dome a lot to help move. the setter puts the vertical members on the bolt, and then the horizontal members. tighten the nut quite a bit to reduce slack. this person is outside the dome.

bolter this person has the impact and will be fastening the members up. Inside the dome

pole passer, this person verifies pattern and makes sure poles go on the screw.

4th person, Utility, can layout pattern for the next layer as long as it does not interfere. Bolt fairy: drops bolt washer washer wing groups at each new vertex. This person can also help get tarps staged and come help hold stuff if there is an exception.

5th, next to last layer needs lifters.

6th/7th, last layer this gets hairy.

Put tarp on before it gets too high.

screw into ground, ratchet straps.

tennis balls to prevent gouges.

Fire extinguishers exit signs

Last layer

The bonkers can push the whole dome over. Make them be as vertical as possible.

Slug trail is very dangerous, it also puts a movement force on the dome.

We need about 6 or 7 people at times to help lift and control shifting. Bonkers must be verical.

Song

it stars with a yellow penta starburst in a blue sky, Mopar would be proud. Red flowers with green leafs. it is Christmas in Ukraine

Brown sphincter surrounded by pink, with silver flower star. with brown extending to orange. surrounded by a black hexagon.

Black forms the super structure, large 2 member pentagon around the red flower, and a large hex, each side 2 members long. The pattern always has two blacks in line.

at the black intersections Two orange three black one green.

Halloween

Tarps

5 tarps across the top.

Entrance

The entrance is across from the stage, and is pointed to by one of the points on the top pentagram. there are a few exposed members around the door to provide sightlines to others.

the brown sphincter is a possible main entrance: an entrance. the stage is centered on a yellow star.

Please make sure the yellow star is on the lowest end of the slope so that the stage can be level and the same height from the ground

There are two triangles cut for emergency exit.

There is a year where the stage is centered on the brown, and the entrance is cut below a yellow star.

In 2024 things led to 2 main entrances and 2 front side exits.

Stage placement

It is nice to have the stairs on the same side as the sound booth, but it makes space tight if there is a videographer It would be nice to have 2 sets of stairs.

If there is a slope, the stage should be at the base of the slope, however sun angles may also be a factor.

Securement

Don't secure until dome is in place and all bottom bolts are tight. there will be a ring all around the base. that can be a tension band.

The matts over the entrance beams can do a lot to hold things down. use stakes in a way that does not trip people.

the orange twist screws can sometimes help, they often screw into the ground near the middle of the member, and use ratchet straps to connect to the intersection.

Often times these don't hold, try another place.

layers

9 layers

layers 8 needs 4 or more and 9 should have 6 or more people