Published · 2026-10-11

C/Z purlin hole-drawing clarification worksheet

Identify the member and drawing before comparing hole patterns. Leave unresolved fields marked To confirm. This worksheet is not an approved fabrication drawing or a structural design.

1. Project and member mark; quantity as drawn and opposite hand : __________
2. Drawing number, revision, date and dimension units : __________
3. C or Z section drawing and the viewing direction used : __________
4. Overall member length and labels for the two cut ends : __________
5. Longitudinal datum: identified end, grid or other drawn reference : __________
6. Hole centres measured from that datum; identify chain dimensions separately : __________
7. Transverse datum and gauge lines shown on the section drawing : __________
8. Hole shape and size; slot direction where applicable : __________
9. Web or flange carrying each hole; identify the face or flange : __________
10. Handedness, orientation and location in the building : __________
11. Cleat, sleeve, lap and restraint drawing references : __________
12. Designer-specified edge distances, tolerances and approval responsibility : __________
13. Unresolved conflicts, requested clarification and agreed drawing revision : __________

Illustrative clarification only: Offer A lists two hole offsets but does not identify the end or view. Offer B names End A and a view but does not state whether its numbers are hole centres or cleat centres. Neither description establishes that the patterns match. Ask for one dimensioned drawing with the same datum, view and revision before recording equivalence. No dimensions, tolerances or hole sizes are prescribed here.