Hi There
We are using HIT-HY 270 + HIT SC sleeve anchors in bricks in our projects extensively, which may be hollow or frog. We know that this is okay to use in these situations, however what happens if the drilling goes on or nearby mortar joints on the bricks? Does it still work, or do we definitely need to be on the center or within the brick? I could not see any literature confirming this issue, can you please suggest and forward the literature about.
Regards
Thank you for your question, whilst we do not specifically recommend fixing into a mortar joint (And any fixing should be larger than the joint) we are aware that this can occur under certain conditions a joint may not be visible and we would refer you to the appropriate published EOTA documents and Influence of Joints section which states
If the wall is designed such that the joints are not to be filled with mortar then the characteristic
resistance NRk,p and NRk,b may be used only if the minimum edge distance cmin to the vertical joints is
observed. If this minimum edge distance cmin cannot be observed then the characteristic resistance NRk,p and
NRk,b has to be reduced by the factor αj = 0,75.
Hi, it also states:
If this minimum edge distance cmin cannot be observed then the characteristic resistance NRk,p and NRk,b has to be reduced by the factor αj = 0,75.
Now, I’ve assumed a conservative approach as your enquiry didn’t confirm your fixing position in relation to any edge or openings such as reveals that may or may not meet with the cmin criteria as no information was provided and I'd taken it that you would know whether it would be relevant or not for your specific connection.
Thanks for the follow up in essence if your fixing falls in a mortar joint then you need to apply the adjustment factor.