crossbeam

"The perpendicular to the wall supported the shelf. "

"The carpenter carefully nailed the floorboards to the joists to create a sturdy base. "

"The primary for the school board was held next Tuesday. "

"The building's structural steel supports the weight of the roof. "

"The horizontal of the classroom desk is sturdy enough to hold a large stack of books. "

"The young workman built a sturdy table for his mother's kitchen. "

"The construction workers used a large crane to lift the heavy steel girder into place, supporting the new office building's floor. "

"The seamstress used a sturdy between to create a precise, even stitch on the thick upholstery fabric. "

"The bridge's sturdy support beams prevented the structure from collapsing. "

"The homeowner secured his house by locking all the doors and windows before leaving for vacation. "

"tightly clenched fingers"

"Can you fasten these boards together with some nails?"