A truss without clashes — no profile passes through another
The main rule of the frame is now checked automatically. Profiles do not cross each other or the supports, and every hole holds one bolt.
Tragwerke
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On a drawing everything can fit, and on site a profile runs into another one or into a concrete block. Solispec now catches such places while you design.
The rule
The owner set the main rule of the truss: no profile passes through another — neither through a neighbouring member nor through a support. And a second one: one hole, one bolt.
What changed in the nodes
- Node B is back to back, in two planes. The rear leg stands on the far side of the rafter and joins the base through a spacer.
- Node B's bolts are apart. The leg-to-base bolt and the inclined strut's bolt used to fall on one line — one hole. The strut's foot now stands one perforation pitch towards node A, and each bolt has its own hole.
- Braces at one point share one bolt. When two braces meet at one point of a leg from opposite faces, one bolt goes through brace, leg and brace. In the parts list that is one bolt instead of two, with fewer nuts and washers.
How it is checked
The new check goes through every pair of truss members, and the members against the supports. It honours end cuts: whatever is cut away touches nothing. A dedicated test runs 13 different layouts. If profiles do cross, the report says so, names the pair and asks to change the bracing or the truss settings.
Members at the base level are now cut flush with its underside — they stand on the block, not in it. The 3D model cuts the parts by the same planes, and the parts list names each cut.
What we found on the way
The check found a few old defects at once, and they are fixed. Split rails overlapped at their joints. Two zigzag braces met at one point of a leg. A lengthened brace end reached the rafter. None of that happens now.