Blokkolom

Blokkolom is a term used in Dutch and Flemish architectural and civil engineering contexts to describe a vertical load-bearing element composed of block materials. Typically, a blokkolom consists of masonry blocks (stone, brick, or concrete) arranged in horizontal courses and bonded with mortar, or of hollow concrete blocks reinforced with steel and grouted to improve strength. The concept contrasts with monolithic columns cast in place or with slender metal columns.

In traditional masonry, blokkoloms are built by stacking blocks around a central shaft or as freestanding columns within walls, with vertical joints aligned to transfer loads. In modern construction, hollow concrete blocks or prestressed concrete blocks may form the column’s core; reinforcement bars are placed through the cores and protected by grout, producing a reinforced block column with higher axial capacity and ductility.

A blokkolom’s capacity depends on block type, bonding, cross-section, and the presence of reinforcement. They are common in warehouses, industrial buildings, and low-rise structures where simple, economical construction is valued. They must be designed to manage compression, buckling, and potential shear or lateral loads; moisture and freeze-thaw can affect long-term performance in masonry variants.

In historical architecture, block columns formed part of load-bearing masonry systems and supported arches and vaults. In prefabricated or modular construction, blokkolom can refer to standardized block elements assembled on site.