fischer fixing-systems main-catalogue Pagina 660
Commercieel klantenaanbod**Beste verkopers van Fischer
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Basic knowledge of fastening technology Dynamics. For predominantly non-static loads. The general building approvals issued by the German Institute of Construction Engineering (DiBt) and the European Technical Approvals / Assessments (ETA) are mainly valid for predominately static loads. However, there are certain applications e. g. swinging cranes, crane rails, jib cranes, elevator guide rails, machines, industrial robots and blast fans in tunnels including antenna and masts which are subjeted to dynamic effects. Elevator guide rails Industrial robots Blast fans In general, the anchoring of components with more than > 1000 load cycles must be carried out using fastening elements that have been checked and approved for this purpose. Until recently, the design for post-installed anchors for such dynamically loaded applications was nearly impossible. Time consuming and costly expert reports and or approvals for individual applications were required. The bonded anchors: fischer Highbond anchor FHB dyn and fischer UMV multicone dyn and FDA have a German DiBt approval for dynamic loads. In the approval, only fatigue loads are considered as dynamic loads and not loads from shock or seismic activity. Antenna and masts The approvals apply to the anchoring of dynamic loads with unlimited numbers of load cycles, for tension and for shear loads. statical strength (statical capacity) 16 In addition, the FHB dyn is manufactured in anchor size M12 and M16 from highly corrosion-resistant steel (e. g. corrosion resistant Class V - 1.4529). Oscillating amplitude fatigue strength (capacity in case of fatigue) Dynamic load tests have shown - compared to normal stainless steel grades of corrosion resistant class III (e. g. 1.4401 also known as 316) – that this material is not only highly suitable for indoor and outdoor humid environments, as well as other agressive conditions, it is also highly suitable for dynamic loadings. durable oscillation strength (durable capacity in case of fatigue) N = 2 ‰ 106 1 10 100 1.000 10.000 100.000 1.000.000 10 Mio. 100 Mio. Number of cycles N Wöhler curve Action Run of the oscillation Possible cause sinusoidal Unbalances, tumbling machines optional, periodical Regularly abutting parts (e.g. punching machines), rail- and road traffic transient optional, nonperiodical Earthquakes impulsive optional, with very short time of influence Impact, explosion harmonic period T periodic period TD 660
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