Pioneering knots build full-size structures out of nothing but wooden poles and rope, a tradition kept alive mainly by Scouts who raise towers, bridges, and gateways at camp. The workhorse is the Square Lashing, which binds two poles where they cross at a right angle and carries the weight of the frame. A Diagonal Lashing, started with a Timber Hitch, braces poles that cross without quite touching, springing them tight to keep the structure from twisting out of square. To make a pole longer, a Round Lashing joins two spars end to end, the same way a tall flagpole is built. A Shear Lashing binds two poles side by side so they can be spread into sturdy A-frame legs, while a Tripod Lashing secures three poles for a freestanding tower base. Like the Square and Round Lashings, these usually start and finish with a Clove Hitch. Tied well, the top pioneering knots and lashings listed below hold firm enough for a whole patrol to climb on.