## Min bolt edge distances, any plus or minus?

## Min bolt edge distances, any plus or minus?

(OP)

Pals

Codes related to steel construction usually specify min edge distance of bolts in terms of hole size D, often as 1.5D, citing possible microfracture related events during drilling or punching.

There must be a tolerance around the code minimums and shouldnt I be allowed to use my judgement after assessing the connection(eg loads are only 10%capacity) and use a thicker plate and an edge distance of 95% x 1.5D = 1.425D?

Your discussion is requested.

respects

IJR

Codes related to steel construction usually specify min edge distance of bolts in terms of hole size D, often as 1.5D, citing possible microfracture related events during drilling or punching.

There must be a tolerance around the code minimums and shouldnt I be allowed to use my judgement after assessing the connection(eg loads are only 10%capacity) and use a thicker plate and an edge distance of 95% x 1.5D = 1.425D?

Your discussion is requested.

respects

IJR

## RE: Min bolt edge distances, any plus or minus?

corus

## RE: Min bolt edge distances, any plus or minus?

Any small software or shareware you know that does the FE modelling faster.

In addition I am talking about purlins where fractures are not likely.

respects

IJR

## RE: Min bolt edge distances, any plus or minus?

I think you should stick to the code.

A minimum value is just that if their was a tolerance either way then the 1.5D wouldn't be a minimum.

Regards

Desertfox

## RE: Min bolt edge distances, any plus or minus?

There are cases when you are squeezed for space, and almost no alternative than to go deeper into the world around the 1.5D

In my professional experience, that and similar situations, is where you employ your engineering capabilities. I have gone through some situations like that where you leave the code and go into papers that were used to develop the code.

One thing about US and Eurocodes, is that US codes come with rich commentaries, whereas Eurocodes come supported by rich documents published by special groups of code experts. So you can around the code.

This is rarely possible in most other codes.

That is the base of my discussion

respects

IJR

## RE: Min bolt edge distances, any plus or minus?

## RE: Min bolt edge distances, any plus or minus?

a simulated cone models projecting to

the opposite side. Thicker might not

be an advantage if this is true

from a clamping standpoint at the inter

faces. I thought there were guidelines

for different values than 1.5 depending

on different thicknesses of the individual

parts.

## RE: Min bolt edge distances, any plus or minus?