For many applications the concrete screws require loosening and retightening to facilitate attachment and realignment or allow levelling of the attached component. As this type of installation procedure is not covered by the current version of European Assessment Document (ETAG 001-3 used as European Assessment Document according to Art. 66 (3) of the Construction Products Regulation(CPR)) and may have a significant influence on the performance(mechanical resistance and stability) of the fastening, this setting process (if permitted for a specific product) needs to be accounted for in the assessment of the anchor to fulfil safety in use requirements.
The mechanical interlock is achieved by screwing the anchor into a pre-drilled cylindrical hole. The special thread of the anchor cuts an internal thread into the concrete member while setting. This type of anchor is commonly referred to as concrete screw. Concrete screws with a thread over the entire anchorage depth are covered only.
This EAD applies to anchors in which all the metal parts directly anchored in the concrete and designed to transmit the applied loads are made of either carbon steel, stainless steel or a combination thereof.
Characteristic resistance under static and quasi-static loading 靜態和准靜態載荷下的阻力特性 Characteristic resistance under seismic loading 地震荷載下特性 Displacements 移位 Reaction to fire 防火等級
Under the CPR, harmonised technical specifications are harmonised European product standards (hENs) established by CEN/CENELEC2 or European Assessment Documents (EADs) produced by the European CPR指令認證的依據是建築指令歐盟協調標準或歐盟評估檔（EADs）
European Organisation for Technical Approvals (EOTA) as the basis for issuing ETAs for products not covered by hENs.The harmonised technical specification for a product defines EEA-wide methods of assessing and declaring 對於沒有被協調標準完全覆蓋的建築產品的認證，可以通過EOTA機構核發ETA認證證書（等同於CE認證書）。
歐盟公告NB機構&TAB機構-捷克TZUS (NB1020)介紹
TZUS是歐盟公告號機構，其歐盟公告號為1020(Notified Body 1020-NB1020)。可以根據歐盟相關規定來簽發CE證書。 TZUS同時也是ETA(European Technical Approval)的認證委員之一，可以根據相關法規來簽發ETA證書。
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