| chimney stack | 1.12 | Outside, above the chimney stack, | ||
| soil stack | 0.46 | I have already extended the soil stack without success. | ||
| vent stack | 0.46 | Wiring, plumbing, vent stacks, air ducts and the chimney typically have holes or gaps that should be sealed. | ||
| bonfire stack | 0.39 | He also noted that the bonfire stack did not fall apart as it toppled to one side. | ||
| library stack | 0.39 | She found the score in the library stacks and has been performing it ever since. | ||
| log stack | 0.33 | In the pictures, students without helmets or safety harnesses can be seen standing on the log stack. |