holes in the base plates

[gil]

Hi.
I would like to ask you some explanations about metal structures. how much the holes are designed must be taken into account a standard which, depending on which the distance of the hole from the edge of the metal plate must be >= to 1.5 diameters (or >2diameters at the center of the hole).
Now we make this hypothesis, in a base plate that will have to lean on the foundation in ca. we hypothesize that the plate will be anchored by threaded bar diameter 20 mm. the hole of the plate must be equal to: 20mm (throat bar)+3mm (zinc and game) + 20mm (maggioration for any adjustments of the position)= 43 mm approximately.
it follows that the distance of the edge of the hole from the plate must be about 45 mm, this often and willingly implies very large plates. more than normally designed, due to the increase of the hole due to the "game" which allows for possible corrections of the position of the plate compared to the blade. the domada is:
Is it fair greater the plate or does the norm contain excitations for the basic plates that I am not aware of?I ask you the question because I rarely see this prescription in buildings.

 

[Er Presidente]

Hi.
....the domada is:
Is it fair greater the plate or does the norm contain excitations for the basic plates that I am not aware of?I ask you the question because I rarely see this prescription in buildings.

with four 20-tires, which column are we holding?

 

[SHIREN]

with four 20-tires, which column are we holding?

http://books.google.it/books?id=k7x...snum=8&ved=0cbwq6aewbzgk#v=onepage&q=&f=false

:finger:

 

[gil]

be and example we say that above that a steel case, or a shed so it is proportional, then the threaded bars that act as fixing to the ca could also be more than 4 at this time I do not think it is fontamental.

However just this morning I got a project, for a car wall mounted a hea120 that rests on a 250x250 plate fixed by four bars diameter 16mm. distance of the hole center from the plate edge 17 mm.
Now I understand what I said in the previous post, how should I proceed?

 

[gil]

mi rispondo:
it is not necessary to increase the plate, at least in the measures indicatedthe norm indicates that the sydtanze of 1.5 diameters and 1,2 diameters are nessary in normal direction and perpendicular effort. since in our case the effort is vertical the horizontal plate does not fall into any of the previous two cases. therefore it is sufficient that the distance from the edge of the hole to the outer edge of the plate is >= to the diameter of the threaded bar.
returning to the pre-living case
d20 bar in a side hole 45 mm, the edge of the plate near the hole should be at least 20 mm and not 45mm.