A column is the vertical structural member that carries the dead and live loads of a building from beams and slabs down to the foundation. In a framed structure the column works as a compression member, shortening slightly under load instead of bending, and its effective depth is at least three times its side dimension, […]
Every slab, beam, girder, and column in a building carries a share of the total load. Before any member can be sized, the engineer must know how much load it receives, and that depends on which parts of the floor or roof feed into it. The tributary area is the loaded region that contributes load
Micropiles, also called mini-piles, pin-piles, or root-piles, are small-diameter, high-strength foundation elements used where conventional piles cannot fit or where access is restricted. A typical micropile is a steel casing, bar, or rib, 6 to 12 inches (150 to 300 millimeters) in diameter, drilled into the ground and filled with high-strength cement grout. The bearing
An LVL spans calculator finds the maximum allowable span for Laminated Veneer Lumber beams and joists, the farthest distance a member can safely cover while carrying its design load. LVL is an engineered wood product built from thin veneers laminated with waterproof adhesive, and its predictable strength lets designers span further with less depth than
An LVL beam span calculator sizes laminated veneer lumber for the distance it must cover. LVL, or laminated veneer lumber, is an engineered wood product made from thin veneers bonded with waterproof adhesive under heat and pressure. The process removes knots and grain defects from the strength calculation, so designers get predictable values for bending,
Every structural element in a building is sized from the loads it must carry. Columns, beams, walls, and slabs each receive loads from the elements above them, and the calculation method traces those loads down the building until they reach the foundation. A column is a vertical compression member that transfers the load of the
The portion of a building above the ground floor level is known as the superstructure, while the portion below it, starting at the plinth, is the substructure. The superstructure includes columns, walls, beams, floors, roofs, doors, windows, lintels, staircases, and every other element that sits above the ground floor. How these elements work together depends
Every building, from a garden shed to a high-rise tower, carries a set of forces that engineers call loads. These forces act on beams, columns, floors, and foundations, and design begins with identifying what they are and how large they can become. Design requirements are usually expressed as the maximum load a structure must be
A live load calculator is a structural engineering tool that estimates the temporary loads a building, bridge, or floor will experience from occupants, furniture, equipment, and other movable items. These loads change during the life of the structure, so engineers size members for the worst realistic arrangement rather than a single fixed weight. The arithmetic
The limit state method is a balanced combination of the working stress method and the ultimate load design method. The working stress method ensures adequate performance at working loads but gives no check of the conditions at collapse. The ultimate load method accounts for failure but can allow excessive deflection and cracking, so it is
