trenail การใช้

• Nails and trenails have not been used in this ship to secure frames to keel.
• In many early ships treenails ( trenails, trunnels ) were used to fasten large timbers.
• The timber arches consisted of 14 layers of timber, each 22 inches by 3 1 / 2 inches, held by trenails.
• Chairs were secured to the sleepers by trenails ( steel spikes driven through a timber sleeve ) or three chair-screws on first class routes.
• Similar wooden trenail fastenings were used as alternatives to metal spikes to secure railroad rail-support " chairs " to wooden sleepers in early Victorian times.
• The stringers were secured to the frames by trenails ( cylindrical wooden dowels about diameter and about long ) driven through pre-drilled holes in both timbers.
• Each arch was made from 14 layers of 22 " x 3-1 / 2 " timbers held together by trenails and built by Messrs . Robson.