What does the term "anchorage" referring to rebar mean?

Anchorage in the context of rebar refers to the method for securing rebar within concrete to ensure it achieves the necessary structural integrity and performance. This involves ensuring that the rebar is properly embedded and positioned in the concrete mix so that it can effectively handle the anticipated loads and stresses. Proper anchorage is critical to transferring forces from the concrete to the rebar and vice versa, which contributes to the overall strength of the reinforced concrete structure.

Reinforcing bars, or rebar, need adequate anchorage to achieve the desired bond and to prevent slippage or failure at the connections. This is typically accomplished through methods such as embedding the bars in the concrete to a specific depth, utilizing mechanical anchors, or implementing hooks or bends at the ends of the bars. Achieving proper anchorage is essential for the performance and durability of the reinforced concrete.

The other options point to different aspects of rebar or concrete mechanics. For instance, the meeting of two rebar pieces relates to splicing, while the protective coating (as in epoxy) is about corrosion resistance. Spacing refers to the arrangement of the bars within a concrete form, which is also important but separate from the concept of anchorage itself.