garage foundation.

[2019]

There is no need for a foundation under the slab at the door detail. It could increase the risk of the slab cracking at this point. You are better off building a slab thickening toe at the point of impact, directly beneath the doors.

The trench only need be 600mm wide for a standard 300mm wide cavity wall.

Would this be the case for both doors. If I had a 4m door on the gable and 3m on the side?

 

[JohnD]

I agree bt the regs here for min strip is 3 times the width of the walls. 300mm thickness aswell. It is excessive but the more concrete, the better the foundation!

Is it peaty ground or something?

 

[noseall]

The images show something more engineered than a mere thickening toe, but you get the idea.

 

[Leofric]

Ah, dimensions in feet and inches, I remember going metric in 1970 I think it was !

 

[2019]

Is it peaty ground or something?

No, good ground it is. Its just the min regs here for foundations are what i said above