A beam is a horizontal structural member provided in buildings to transfer loads from the structures above to the columns, walls, and foundations. Among the different types of beams used in building construction, tie-beam and plinth beams are the two common types.
A plinth beam is constructed at the plinth level, while a tie-beam is built above the plinth level.
This article explains the differences between plinth beams and tie-beams used in building construction.
Differences Between Plinth Beam and Tie-Beam
| Plinth Beam | Tie-Beam |
| Plinth beam is a beam member constructed at the plinth level, which separates the superstructure and substructure of the building. | Tie-beam is a beam member constructed at a height higher than the floor level to tie or connect two column members or rafters. |
| The main function of the plinth beam is to hold all the columns and walls together to transfer loads uniformly to the foundation. | The main function of the tie-beam is to act as a length breaker for the column when the ceiling height is greater than the normal height. In such situations, a tie-beam joins the columns to reduce their efficient size and slenderness ratio. |
| Plinth beams are involved in all types of load transfer. | Tie-beams are not engaged in any vertical load transfer but take axial compression load. They are used to increase the stiffness of the structure. |
| Plinth beams are constructed only at the plinth level. | Tie-beams are constructed anywhere between plinth level and floor level for columns with a height of more than 4 to 5 meters. |
| Plinth beam reduces differential settlement, prevents cracks from reaching the wall and moisture penetration. | Tie-beam effectively prevents the column from buckling failure or holds the rafters and columns together in a truss system. |
| Plinth beams are constructed with reinforced cement concrete in structures. | Tie-beams can be made of steel, wood, or reinforced cement concrete based on the type of building construction. |
Plinth beams are a type of tie-beam constructed at the plinth level. But, both types differ based on the function they perform in a building.Â
FAQs
Plinth beam is a beam member constructed at the plinth level, which separates the superstructure and substructure of the building.
The main function of the plinth beam is to hold all the columns and walls together to transfer loads uniformly to the foundation.Â
Tie-beam is a beam member constructed at a height higher than the floor level to tie or connect two column members or rafters.
Plinth beams are a type of tie-beam constructed at the plinth level. But, both types differ based on the function they perform in a building.
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