Obviously, the heart and strength of the wing is the wing spar,it is also the backbone for the rest of the wing structure.
The flight, landing, thrust and drag loads are absorbed and distributed to the rest of the wing structure by the ( 1.5mm -1.2mm) wrap-around ply leading edge D- BOX.
With some of the wing structure completed during the winter months a great deal of use was made of Bed elecric blankets,these blankets when insulated/covered in one or two layers of bubble wrap, ensure a steady overnight temperature of 70f
At this time I also installed oval plastic electrical wiring conduit.
The same materials are used for the hydraulic brake cables,and the pitot-static system .