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Square Beams

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These four-sided, heavy-duty aluminum beams are the structural building blocks for creating with the TETRIX® PRIME Building System. They come in seven lengths to provide you with flexible building options, and the beams can be cut to custom lengths with a metal-cutting blade.

Beams are 16 mm square.

Options Available
From $4.95

This internal connector connects the ends of three beams at 90° angles, creating a corner. Made of ABS plastic; requires Quick Rivets and Pegs or Thumbscrews and Wing Nuts (all sold separately).

$3.25

This external bracket connects two square aluminum beams at a 60-degree angle. Also used to create 120-degree angles. Use in pairs for optimum strength. Made of ABS plastic; requires Quick Rivets and Pegs or Thumbscrews and Wing Nuts (all sold separately).

$4.95

Made of ABS plastic, these external brackets are tough and reliable for connecting two square aluminum beams at a 90-degree angle. Use in pairs for optimum strength. Requires Quick Rivets and Pegs or Thumbscrews and Wing Nuts (all sold separately).

$4.95

Join the ends of two beams at a 90° angle easily with this internal connector that slides inside the beams to create a clean-looking and strong connection. Made of ABS plastic; requires Quick Rivets and Pegs or Thumbscrews and Wing Nuts (all sold separately).

$2.95

Joins two aluminum beams with one beam width in between at a 90-degree angle. Made of acetal plastic; requires a thumbscrew, sold separately.

$7.95

Use this hub to attach a 6 mm shaft through an aluminum beam to form a pivot. Made of acetal plastic. Requires TETRIX® PRIME Thumbscrews and Socket Head Cap Screws, sold separately.

$3.95

Similar to the tee beam connector, this internal connector is used to join a beam end to a beam side at a 90-degree angle. Made of acetal plastic; requires quick rivets and pegs and a thumbscrew (all sold separately).

$2.50

This connector brings together two square aluminum beams end to end without adding any space between. Made of ABS plastic; requires Quick Rivets and Pegs or Thumbscrews and Wing Nuts (all sold separately).

$2.75

Sometimes, special sizing requires specialized solutions. This connector is just that: it connects two square aluminum beams end to end, adding one beam width in between. Made of ABS plastic; requires Quick Rivets and Pegs or Thumbscrews and Wing Nuts (all sold separately).

$2.95

Connects aluminum beams in parallel with one beam width between to enable creative design options. Made of acetal plastic; requires a TETRIX® PRIME Thumbscrew, sold separately.

$7.95

PRIME’s Tee Beam Bracket connects two Square Beams so one is perpendicular to the other, creating a T. Can connect along the length of one beam to the end of another. Used in pairs with one on each side of the beams. Made of ABS plastic; requires Quick Rivets and Pegs or Thumbscrews and Wing Nuts (all sold separately).

$5.95

This internal tee connector connects the ends of three beams at 90 degrees to create a T joint while keeping the joint looking neat. Made of ABS plastic; requires Quick Rivets and Pegs or Thumbscrews and Wing Nuts (all sold separately).

$3.25

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