Visible here is the wooden batten that is reinforce with the metal strip. This strip ends in a loop.
When mounted together, these loops are interconnected with wire, The downwards working weight of the roof creates stress in the thus composed roof beam and it is this metal strip that takes this tensile load.
The presure part of this load is taken in wood on wood contact, but sidewise supported by the sheet meal cap (dark brown) at the ende of the batten.