metric v modular building block sizes?

[jim]

Metric sized building blocks (commonly 440 x 100 x 215mm) have been around since metric sizes arrived in the 70s.

What is the application for 'modular sizes' (eg 390 x 100 x 190 - even

390 x 90 x 190)?

eg

a new standard being introduced? Most block manufacturers websites show this size in addition to the metric ones.

Also, especially, why 90mm? Anything less than 100mm in a wall leaf is usually frowned on.

I inadvertently bought some grr...grrr...

Anyone know?

TIA for any info

[Rick Hughes]

> Is a new standard being introduced? Most block manufacturers websites

Maybe it's 'effin safely' standard 18" x 9" x 4" dense concrete blocks might be too heavy for brickies .... I humped cwt bags of cement about on summer holidays when working for Building companies ... now it's considered too heavy to lift and 25Kg baby bags are the norm.

[PeterC]

>>> Is a new standard being introduced? Most block manufacturers websites

Probably needed doing. My Brother used to carry 200lb sacks of beans, throw hay bales up 6 layers etc. when working on a farm. When he worked in removals, he lifted a heavy, 3/4-seater settee by one end to give it to the

2 blokes at the top of some steps. He now suffers from arthritis and investigation has shown that most of his joints are worn out. I'm 3 years older and have no arthritis - the advantage of light mechanical and chemical work.

[sm_jamieson]

Its to create spacing of 400mm and 200mm, supposedly reduces cutting, presumably when its all blocks and no bricks. Also, as others pointed out, reduced weight. I bought some standard sized blocks, and noticed they were all about

95mm. Was quite obvious when laying in with some bricks, 102.5mm. Simon.

[The Natural Philosopher]

Max parcel weight is 35Kg on most things.

We are a nation of wusses these days.

[Rick Hughes]

>>>>> Is a new standard being introduced? Most block manufacturers websites

1cwt used to be such a standard load ......... 25kg ? .... I blame the EEC, never would have happened when the Atlas was pink.