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dpack



Joined: 02 Jul 2005
Posts: 38503
Location: yes
PostPosted: Fri Sep 04, 20 8:52 am    Post subject: Reply with quote
    

when screwing polycarb to timber use oversize pilot holes, soft washers and flat head screws

putting all the stresses on small rigid points can cause problems in winds and with thermal or timber movement.

jema
Downsizer Moderator


Joined: 28 Oct 2004
Posts: 26979
Location: escaped from Swindon
PostPosted: Fri Sep 04, 20 3:12 pm    Post subject: Reply with quote
    



Another raised bed build one the overhanging decking boards cut back. Polycarb on order, I have not been using washers more relying on lots of screws to prevent movement and spread load. We have had a lot of wind and no damage to existing stuff.

Mistress Rose



Joined: 21 Jul 2011
Posts: 12238

PostPosted: Sat Sep 05, 20 9:58 am    Post subject: Reply with quote
    

Another thing with polycarb is that it does deteriorate in sunlight, so as it ages, look out for damage. The ribbed stuff with air pockets on sons greenhouse is very brittle and disintegrating. Not sure how many years it has been there, but a good few I think.

dpack



Joined: 02 Jul 2005
Posts: 38503
Location: yes
PostPosted: Sat Sep 05, 20 10:38 am    Post subject: Reply with quote
    

dpack wrote:
when screwing polycarb to timber use oversize pilot holes, soft washers and flat head screws

putting all the stresses on small rigid points can cause problems in winds and with thermal or timber movement.


that should read soft and metal washers

jema
Downsizer Moderator


Joined: 28 Oct 2004
Posts: 26979
Location: escaped from Swindon
PostPosted: Sun Sep 06, 20 2:23 pm    Post subject: Reply with quote
    



Another last post of the season. Occurred to me I had the post, the remains of a bulk bag of ballast and opened cement.
So that's all of a bulk bag gone on 5 posts, the rest were postcrete.

dpack



Joined: 02 Jul 2005
Posts: 38503
Location: yes
PostPosted: Sun Sep 06, 20 4:05 pm    Post subject: Reply with quote
    

well done, tis nice to finish a bag

Mistress Rose



Joined: 21 Jul 2011
Posts: 12238

PostPosted: Mon Sep 07, 20 6:36 am    Post subject: Reply with quote
    

Good that you managed to finish off.

jema
Downsizer Moderator


Joined: 28 Oct 2004
Posts: 26979
Location: escaped from Swindon
PostPosted: Wed Sep 09, 20 2:03 pm    Post subject: Reply with quote
    





A couple of finishing touches. After all the heavy duty stuff the little bit of extra decking and small gravel path is just spikes gravel and sleepers.

Mistress Rose



Joined: 21 Jul 2011
Posts: 12238

PostPosted: Thu Sep 10, 20 7:00 am    Post subject: Reply with quote
    

Looks good. How come all your beds look thriving and full the minute you put them in? It takes husband about a year to get round to cutting the materials and another year to get round to putting them in and filling them, then I have to sow or plant out. Can't handle the western red cedar boards on my own, and he reserves the right to do the woodwork. I let him as if I do it he only critisises.

jema
Downsizer Moderator


Joined: 28 Oct 2004
Posts: 26979
Location: escaped from Swindon
PostPosted: Thu Sep 10, 20 2:20 pm    Post subject: Reply with quote
    





Something has occurred to me, I have a couple of new sleeper offcuts, and a couple of new sleepers. Also not withstanding it's full of crap at the moment and will be filled with more raised beds, it's still going to be the composting area and not a great view. So why not create a substantive feature with the sleepers?

jema
Downsizer Moderator


Joined: 28 Oct 2004
Posts: 26979
Location: escaped from Swindon
PostPosted: Sun Sep 13, 20 2:37 pm    Post subject: Reply with quote
    





Starting to tidy up a bit and get some polycarb on the roof of the beds

dpack



Joined: 02 Jul 2005
Posts: 38503
Location: yes
PostPosted: Sun Sep 13, 20 5:00 pm    Post subject: Reply with quote
    

double or triple wall?

either looks like a roof

dpack



Joined: 02 Jul 2005
Posts: 38503
Location: yes
PostPosted: Sun Sep 13, 20 5:12 pm    Post subject: Reply with quote
    

ps having grown up in a windy place i might suggest at least another two fixings between the current centres

jema
Downsizer Moderator


Joined: 28 Oct 2004
Posts: 26979
Location: escaped from Swindon
PostPosted: Sun Sep 13, 20 5:28 pm    Post subject: Reply with quote
    

It's just basic 4mm twinwall. I figure I am making it significantly stronger than the existing greenhouse. A greenhouse that is not quite strong enough for the wind here! My attitude is that this is not critical, if it's not enough repairing it stronger is easy.

dpack



Joined: 02 Jul 2005
Posts: 38503
Location: yes
PostPosted: Sun Sep 13, 20 6:10 pm    Post subject: Reply with quote
    

twin should be ok so long as it cannot flap up and down

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