hi , is a structural engineer required ?
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| 1 | Hi there , I'd like to strengthen some of the trusses in our 26 year old home , mainly the straight row of about 6.. at times the top join / peak, creak and crack in high wind or temperature change , there is a touch of movement in them , house isnt going anywhere , its more for noise reduction, do I need to get a structural engineer to do a refit plan for a builder friend of mine ,to follow ,he said its a very simple adjustment , which is fine but I don't want any issues if I ever sell the house ... as well as the engineer question your thoughts on how you would approach the strengthening might be handy to.Ive upgraded the original loose fill insulation to a quality one so im sure thats going to help also, just finished that. daz1968 - 2020-11-10 18:10:00 |
| 2 | Normal web trusses can be strengthened with ply attached to the sides. Will cut the creaking to nothing. smallwoods - 2020-11-10 23:19:00 |
| 3 | smallwoods wrote:
thanks for your opinion / advice , I guess cut to size about 400- 500, funny the builder at council suggested this today , as can remove if screwed if necessary in the future, I thought run 4x2 wide side flat on a row of trusses say maybe 200 down from the peak to tie them all together ? thought might be less work and stronger again , but I do like your idea also :) daz1968 - 2020-11-11 10:36:00 |
| 4 | No, ply by far the easiest and strongest. smallwoods - 2020-11-11 12:01:00 |
| 5 | smallwoods wrote:
well after a chat with builder at council today and a structural engineer they both suggested what you said :) so thanks for the initial idea, the engineer called it a plywood gusset and sent pics , still dont get how it stops slight movement the other direction , but my knowledge is in another area.. so will get a friend whos a builder to cut to size and install while doing some other stuff, thanks very much for your help I find this site great for opinions and advice, daz1968 - 2020-11-11 19:00:00 |
| 6 | what thickness of ply would you suggest? and any special grade. kenw1 - 2020-11-12 19:19:00 |
| 7 | The member deleted this message. kenw1 - 2020-11-12 19:19:00 |
| 8 | kenw1 wrote:
hi I was advised any structural plywood from 12mm to 17mm , not sure daz1968 - 2020-11-12 19:27:00 |
| 9 | Structural ply 12mm 5 ply, not the "builders" grade or anything else. Nail through the gusset and clench the nails on the other side. Nails are better than screws here as they are more able to cope with movement, screws can be quite brittle. fastspec - 2020-11-12 20:16:00 |
| 10 | fastspec wrote: daz1968 - 2020-11-13 13:04:00 |
| 11 | plywood gussets all the way ,but...you say "there is a bit of movement in them" ...is the movement lateral or up and down ? bergkamp - 2020-11-14 21:51:00 |
| 12 | fastspec wrote:
as I understand it structural ply has a better glue , more waterproof - i think this is the only difference bergkamp - 2020-11-14 21:54:00 |
| 13 | bergkamp wrote:
And the layers of ply making it up are normally better with less voids . Quite a lot of differences in Structural ply compared to say bracing ply . Edited by martin11 at 8:02 am, Sun 15 Nov martin11 - 2020-11-15 08:02:00 |
| 14 | martin11 wrote:
Bracing ply isn"t structural ? bergkamp - 2020-11-15 09:40:00 |
| 15 | bergkamp wrote:
Well it does depend on "what" you are bracing! smallwoods - 2020-11-15 12:52:00 |
| 16 | smallwoods wrote: . Exactly ..all bracing is structural ....which goes against previous post bergkamp - 2020-11-15 15:20:00 |
| 17 | bergkamp wrote:
Yes and following this logic, any ply can be used for bracing. smallwoods - 2020-11-15 20:45:00 |
| 18 | Structural ply as in plywood made to NZS 2269 and marked as such, not the cheap "builders ply" or "downgrade" Edited by fastspec at 8:36 pm, Mon 23 Nov fastspec - 2020-11-23 20:35:00 |
