A "pilot hole" is a hole drilled into a wood surface prior to installing a screw. Pilot holes help to: Prevent wood from splitting from large screws or when near the end or edge of the board. Make installing the screw easier in hard materials, such as oak or maple. Improve accuracy b...
When you rotate the screw into the wood, it pulls itself in and threads itself into the fibers. The good thing about screws is they are removable, but over the course of years the cut threads become wider and wider and the screw will eventually loosen up....
Two mL of the supernatant was decanted into a 2 mL screw-top glass HPLC vial [37] and aliquots of 100 µL for each sample were directly injected into the system by an auto-sampler (VH-A10-A, Thermo Fisher Scientific, Waltham, MA, USA). The instrumental analysis was conducted with a...
To enhance the load transfer to the joist, place another block under the overhanging block, and screw the second block into the joist as shown in Figure 7c. Figure 7. (a) Extra lumber made into blocks that line up with the module’s holes, (b) a bolt inserted from under and secured...