A steel space-frame construction system includes at least a first stud, a second stud, a channel, a block, and a top cap or a second block. A first end of the first stud resides in the channel and is secured thereto. The block is secured to the first stud. A first end of the second stud resides in the channel, and the second stud is secured to the block and the channel. The block provides a predetermined fixed spacing between the first stud and the second stud. The top cap or a second block is secured to the first stud and the second stud at a second end thereof. The channel is repositioned so that the opposite sides of the first stud, second stud, block, channel, and top cap or second block may be secured together, thereby forming a space-frame.