Abstract: A modular structural member (100) comprising: at least two connection portions (102), and a structural portion (101), the connection portions arranged to provide electrical and mechanical connection to other structural members, and wherein, electronic componentry (125) is provided on the structural portion, and/or the connection portions are arranged to receive a fastener (240; 260), to connect multiple connection portions together, which is provided with electronic componentry, and further wherein, a plurality of the structural members arranged to be connected together to form a structure.