When I look in your technical data sheet for HIT-HY-200 and look at the setting details for HAS-U it is stated that if the spacing is smaller than critical spacing the design loads have to be reduced. However it is not stated how much or in what way they have to be reduced. To see what I am talking about, look at page 14 of the attached file, the statement is marked in yellow. How do I myself reduce the design loads in order to match my current setting details?
I have tried using PROFIS Engineering without any luck, and are serching for a way to correct the calculations without using PROFIS Engineering. Is that possible?
Thank you for your question. The data you are looking at is a simplified case for nothing more than a single anchor without influencing factors . In situations where the design requirements fall outside of this criteria - vast majority our recommendation is to use the Profis Engineering software though you can also the same process by hand using EC2 Part 4 in conjunction with the products ETA. Regarding the requirements to check the Ccr,sp and Scr,sp, these are used for calculating resistance of splitting failure mode. Splitting failure mode is directly influenced by slab thickness. Therefore, if your project case has a thin slab which is smaller than the ETA value of the anchor then try to think about the following two aspects:
Reduce Possibility of failure during installation and the consequence: Use anchors which generate relatively small splitting force such as screw anchor, bonded anchor.
If there no edge and spacing influence, thickness can be thinner than hmin, but there is no information available for how small can it be.
Eliminate the possibility of splitting failure:
In the design code, it states that splitting failure verification can be omitted if:
The characteristic resistances for concrete cone failure and pull-out failure (headed and post- installed mechanical fasteners) or combined pull-out and concrete failure (bonded fasteners) are calculated for cracked concrete and reinforcement resists the splitting forces and limits the crack width to wk ≤ 0,3mm.