Modular support construction

A construction beam extending along a longitudinal axis and formed with at least one longitudinal U-like shaped groove parallel to said longitudinal axis and being defined between a pair of facing side walls and a base wall spanning therebetween, said side walls being formed with a plurality of parallel, spaced apart longitudinal ribs projecting therefrom, which together mimic a portion of nominal threaded bore, and wherein the groove is formed such that:

• H/D≦1.8
• wherein H is the height of the groove, and D is the distance between said side walls, and wherein the axial force necessary to remove a screw threaded therein the groove and fully penetrating said base wall is given by:
• F<3.7×TYS×D
• wherein F is said axial force in newtons, and TYS is the tensile yield strength in N/mm2 of the material of the construction beam.

An insert coupling beam for a construction system, said insert coupling beam configured for snugly sliding within a construction beam and for fixedly securing thereto by virtue of at least one fastener, said insert coupling beam comprising at least one longitudinal U-like shaped groove defined between a pair of facing side walls and a base wall spanning therebetween, said side walls being formed with a plurality of parallel, spaced apart longitudinal ribs projecting therefrom, which together mimic a portion of nominal threaded bore, and wherein the groove is formed such that:

• H/D≦1.8
• wherein H is the height of the groove, and D is the distance between said side walls, and wherein the axial force necessary to remove a screw threaded therein the groove and fully penetrating said base wall is given by:
• F<3.7×TYS×D
• wherein F is said axial force in newtons, and TYS is the tensile yield strength in N/mm2 of the material of the insert coupling beam.

An elongate construction element comprising a rigid elongate tubular body formed with at least one longitudinal U-like shaped groove being defined between a pair of facing side walls and a base wall spanning therebetween, said side walls being formed with a plurality of parallel, spaced apart longitudinal ribs projecting therefrom, which together mimic a portion of nominal threaded bore, and wherein the groove is formed such that:

• H/D≦1.8
• wherein H is the height of the groove, and D is the distance between said side walls, and wherein the axial force necessary to remove a screw threaded therein the groove and fully penetrating said base wall is given by:
• F<3.7×TYS×D
• wherein F is said axial force in newtons, and TYS is the tensile yield strength in N/mm2 of the material of the construction element.