For symbols not defined in this section, refer to Pt 1, Ch 1, Sec 4.
S : Primary supporting member spacing as defined in Pt 1, Ch 3, Sec 7, [1.2.2],
in m.
Ct-pr
: Permissible shear stress coefficient for primary supporting members taken equal
to:
- Ct-pr
= 0.70 for AC-S.
- Ct-pr
= 0.85 for AC-SD.
Cs-pr
: Permissible bending stress coefficient for primary supporting members taken equal
to:
- Cs-pr
= 0.70 for AC-S.
- Cs-pr
= 0.85 for AC-SD.
scg : Half pitch length of corrugation, in mm. See Figure 4.
ℓcg : Length of corrugation, in m, which is defined as the distance
between the lower stool and the upper stool. Where no lower or upper stool is fitted,
ℓcg is to be measured to lower or upper end as shown in Figure
4.