Christmas Lights Obelisk/Pyramid

9 Jan

s_img_0077crop
Barbara wanted some pretty Christmas lights. It was a bit late for Christmas (i.e. it was January). So?

s_img_0057

We started with some 100×25 Oregon, ripped in down to 50×25. Here I’ve chopped four 1600mm lengths to form the sides of the pyramid/obelisk. We found a nice looking christmas tree on Google Images then used a graphics package to measure the angle – turns out that 80°  from horizontal was the angle we thought looked good.

s_img_0058

Some simple trigonometry gave us the size of the base (close enough to 500mm), to get the angle we wanted. Some more 50×25 oregon and various offcuts from the mitre saw gave us a base.

s_img_0063

We braced it up for strength, since I planned on placing one or two concrete blocks onto the base to weight it down. (We get strong winds around our place).

s_img_0064

Some 7mm holes and M6 bolts attached the ‘legs’ to the base. Forgot to allow for the 25mm offset from the ends of the pieces of wood, so our angle won’t be quite correct.

s_img_0065

A very sophisticated (not) mechanism fastened the top together. One zip-tie.

s_img_0069

Here’s the result so far, with a human for size comparison.

s_img_0070

Chicken wire! Messy stuff to work with, but a compressed air stapler made it easy to pin it down. We only put wire over three sides, leaving the fourth side open to allow placing concrete blocks (for weight) and christmas tree lights (for pretty).

s_img_0072

We put it up on an earth bank overnight, to check it wouldn’t blow down.

s_img_0075

Barbara fitted the lights through the chicken mesh. Took quite a while. Here we ran a quick test in a darkened room. Looking good!

s_img_0078crop
Come nightfall, it was very pretty.

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: