EXAMPLE:
Determine the tie-wire spacing (in inches) if the ULW is 1,250 pounds per linear foot and
you are using No. 9 steel wire gage.
1,420 x 12
17,040
Tie-wire spacing =
=
= 13.6, round down to 13 in
(14)
1,250
1,250
Problem 16. Work the following problem to see how well you understand the concept
covered in step 12. The solution to this problem is found at the end of the lesson. Determine
the tie-wire spacing (in inches) if the ULW is 1,200 pounds per linear foot and you are using
No. 8 steel wire gage.
A.
14
B.
16
C.
17
D.
18
Step 13. Determine the maximum tie-wire spacing. Determine the maximum tie-wire spacing
by comparing the results from steps 11 and 12 and then using the smaller of the two tie-wire
spacings as the maximum tie-wire spacing.
EXAMPLE:
Determine the maximum tie-wire spacing value by comparing the following measurements:
Tie-wire spacing based on wale size = 24 inches.
Tie-wire spacing based on wire strength = 20 inches.
Use the smaller tie-wire spacing of 20 inches for the maximum tie-wire spacing.
Problem 17. Work the following problem to see how well you understand the concept
covered in step 13. The solution to this problem is found at the end of the lesson. Determine
the maximum tie-wire spacing value by comparing the following measurements:
Tie-wire spacing based on wale size = 26 inches.
Tie-wire spacing based on wire strength = 16 inches.
Use the smaller tie-wire spacing of 16 inches for the maximum tie-wire spacing.
Step 14. Determine the location (spacing) of the ties. Now that you have obtained the
maximum stud spacing (step 7) and the maximum tie-wire spacing (step 13), it is time to
compare the two. The correct location of your ties must be determined to ensure that the form
design has the proper strength.
NOTE: This step is performed only when using wires. If using snap ties, the spacing is
found in Table 5.
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