Frame fixers - what does the size represent?

I need to fix a length of old fashioned 4 by 2 to a masonry wall in order to hang a side gate. I've been told that frame fixers (like giant plastic rawlplugs) would work well but when I look them up I'm not sure what the size given refers to and what size I would need.

Does the length given refer just to the plastic plug bit? If so would I need to add 50mm to this length (the thickness of the wood) in addition to having a decent amount actually in the wall (e.g. another 50mm).

So I guess my question is "Would 100mm frame fixers with a no 8 screws be OK?"

Thanks for any comments/advice/experience etc.

diymosththings

 

Thanks one and all - those metal screws look great but the problem is I only need 4 fixings, not 100. Thanks to Mr. Handyandy for answering my specific question!

 

OK Phil noted thank you-but two problems for me.
1. I only need 4 fixings (would have to buy 100 of these).
2. You need to bore a clearance hole in the wood to accept a socket spanner to tighten it - then it has to be filled etc.

kind regards

diymostthings

 

Thanks again - well I just thought of a good reason for using your bolts - I'm quite close to the edge of the masonry so the smaller the hole I have to drill the betterand I think the bolts may have less of a sideways force than frame fixers. I'll look out for a source of small quantities.

kind regards

diymostthings

 

Thanks for that DIYDave = be interesting to see how long that post lasts!

diymostthings

 

OK - I've bought them! (0.44p each for M6 x 100 Thunderbolts). Bloke in the shop recommended them too - he said they havn't sold FF for at least 3 years! Eaasy to choose the drill size too - 6mm!

That postcrete is dear though isn't it? Still - worth avoiding all the dealys with normal cement.

Thanks CGN and everyone else

Kind regards

diymostthings