Patent ID: 8418425

Claim:
A tubular beam for the construction of temporary structures, comprising: a hollow rectangular tube having a first end, a second end and four substantially planar sides defining a cavity, each side having a first end and a second end defining the first and second ends of the beam, a plurality of tube access openings are formed through at least one of said four sides, a fastener hole pattern is formed around each one of said plurality of tube access openings, said fastener hole pattern includes a plurality of fastener holes; and a first end plate is attached to said first ends of said sides, a second end plate is attached to said second ends of said sides, a first end access opening is formed through said first end plate and adjacent and in communication with the tube cavity, and a second end access opening is formed through said second end plate and adjacent and in communication with the tube cavity, an end fastener hole pattern is formed around said first and second end access openings, said end fastener hole pattern includes a plurality of end fastener holes, said end fastener hole pattern is the same as said fastener hole pattern, wherein one of the ends of the tubular beam is attachable to a side of a second tubular beam having the fastener hole pattern and the end fastener hole pattern by securing fasteners to one of said plurality of fastener hole patterns and said end fastener hole pattern.