The hoops and grillage of wooden tanks shall be inspected at what interval?

The hoops and grillage of wooden tanks shall be inspected at what interval?

• A. Biannually
• B. Monthly
• C. Quarterly
• D. Annually

Answer: (D)

Hoops and grillage hold the wooden tank’s staves together and keep it watertight. Over time, moisture, weather, and aging can loosen hoops, cause wood to crack or rot, and allow fasteners to corrode. Because deterioration develops gradually, checking these components once a year is enough to catch emerging problems before leaks or structural failure occur. More frequent inspections aren’t typically needed for routine maintenance and would add little safety benefit, while biannual or more frequent checks could miss slow deterioration if done too rarely. If you find loose hoops, cracked or rotted wood, or damaged grillage, address it promptly and recheck after repairs.

Hoops and grillage hold the wooden tank’s staves together and keep it watertight. Over time, moisture, weather, and aging can loosen hoops, cause wood to crack or rot, and allow fasteners to corrode. Because deterioration develops gradually, checking these components once a year is enough to catch emerging problems before leaks or structural failure occur. More frequent inspections aren’t typically needed for routine maintenance and would add little safety benefit, while biannual or more frequent checks could miss slow deterioration if done too rarely. If you find loose hoops, cracked or rotted wood, or damaged grillage, address it promptly and recheck after repairs.