A cable trough system comprising: a first plurality of cuboid members, each cuboid member comprising a top casing and a bottom casing joined to form an elongate body encompassing a hollow cavity that is accessible from a front opening and a back opening respectively located at a front end and a back end of the cuboid member, each of the first plurality of cuboid members connected in tandem or series with each other such that the back opening of one cuboid member resides adjacent to the front opening of a next cuboid member at an interface or joint where two adjacent cuboid members are coupled; a plurality of top bracket and bottom bracket pairs, wherein for each top bracket and bottom bracket pair the top bracket and bottom bracket is respectively secured or fastened to a joint where edges of the top casing and edges of the bottom casing of two adjacent cuboid members meet; and a plurality of belts and corresponding buckles, each belt slidably engageable with its corresponding buckle, each belt comprising a fabric having one end engaged to its corresponding buckle and another end insertable to the buckle, each buckle including an outer frame carrying one or more crossbars to catch against the belt for strapping and securing the belt around the elongate body of a cuboid member and securing the top casing to the bottom casing thereof, wherein each buckle is configured to allow its corresponding belt to slide out of the buckle a limited distance permitting at least some upward lifting of the top casing of a cuboid member away from the bottom casing thereby creating a gap for discharging increased air pressure within the hollow cavity in the occurrence of a fire or explosive incident within the hollow cavity when the increased air pressure reaches or exceeds a predetermined level, threshold, or value; and a protective sheet placed within the cavity overlaying the joint of two adjacent cuboid members at each bottom casing, wherein the protective sheet is configured for at least partially absorbing a force or impact directed toward the joint due to the increased air pressure. a first plurality of cuboid members, each cuboid member comprising a top casing and a bottom casing joined to form an elongate body encompassing a hollow cavity that is accessible from a front opening and a back opening respectively located at a front end and a back end of the cuboid member, each of the first plurality of cuboid members connected in tandem or series with each other such that the back opening of one cuboid member resides adjacent to the front opening of a next cuboid member at an interface or joint where two adjacent cuboid members are coupled; a plurality of top bracket and bottom bracket pairs, wherein for each top bracket and bottom bracket pair the top bracket and bottom bracket is respectively secured or fastened to a joint where edges of the top casing and edges of the bottom casing of two adjacent cuboid members meet; and a plurality of belts and corresponding buckles, each belt slidably engageable with its corresponding buckle, each belt comprising a fabric having one end engaged to its corresponding buckle and another end insertable to the buckle, each buckle including an outer frame carrying one or more crossbars to catch against the belt for strapping and securing the belt around the elongate body of a cuboid member and securing the top casing to the bottom casing thereof, wherein each buckle is configured to allow its corresponding belt to slide out of the buckle a limited distance permitting at least some upward lifting of the top casing of a cuboid member away from the bottom casing thereby creating a gap for discharging increased air pressure within the hollow cavity in the occurrence of a fire or explosive incident within the hollow cavity when the increased air pressure reaches or exceeds a predetermined level, threshold, or value; and a protective sheet placed within the cavity overlaying the joint of two adjacent cuboid members at each bottom casing, wherein the protective sheet is configured for at least partially absorbing a force or impact directed toward the joint due to the increased air pressure.