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Operating segments (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Aug. 31, 2024 | Aug. 31, 2023 | Aug. 31, 2024 | Aug. 31, 2023 | Feb. 29, 2024 | Sep. 30, 2022
Operations and assets by segment |  |  |  |  |  |
Sales | $ 409,007 | $ 398,542 | $ 822,215 | $ 789,415 |  |
Cost of sales | 305,493 | 301,296 | 616,031 | 595,150 |  |
Gross margin | 103,514 | 97,246 | 206,184 | 194,265 |  |
Selling, general and administrative | 35,868 | 36,239 | 68,789 | 67,762 |  |
Operating income (loss) | 67,646 | 61,007 | 137,395 | 126,503 |  |
Interest expense, net | (21,909) | (27,770) | (44,683) | (56,476) |  |
Equity in earnings of unconsolidated subsidiaries | 1,478 | 974 | 5,302 | 2,394 |  |
Other (expense) income | 417 | 88 | 621 | 50 |  |
Income (loss) before income tax | 47,632 | 34,299 | 98,635 | 72,471 |  |
Income taxes | 12,213 | 5,967 | 23,614 | 15,617 |  |
Net income from continuing operations | 35,419 | 28,332 | 75,021 | 56,854 |  |
Assets: | 2,240,330 |  | 2,240,330 |  | $ 2,195,505 |
Property, plant and equipment, net | $ 569,732 |  | $ 569,732 |  | 541,652 |
AIS Joint Venture |  |  |  |  |  |
Operations and assets by segment |  |  |  |  |  |
Ownership percentage of investment | 40.00% |  | 40.00% |  |  | 40.00%
United States |  |  |  |  |  |
Operations and assets by segment |  |  |  |  |  |
Sales | $ 398,658 | 388,538 | $ 801,709 | 769,860 |  |
Property, plant and equipment, net | 550,761 |  | 550,761 |  | 522,693 |
Canada |  |  |  |  |  |
Operations and assets by segment |  |  |  |  |  |
Sales | 10,349 | 10,004 | 20,506 | 19,555 |  |
Property, plant and equipment, net | 18,971 |  | 18,971 |  | 18,959 |
Corporate |  |  |  |  |  |
Operations and assets by segment |  |  |  |  |  |
Sales | 0 | 0 | 0 | 0 |  |
Cost of sales | 0 | 0 | 0 | 0 |  |
Gross margin | 0 | 0 | 0 | 0 |  |
Selling, general and administrative | 22,563 | 17,148 | 40,811 | 34,791 |  |
Operating income (loss) | (22,563) | (17,148) | (40,811) | (34,791) |  |
Interest expense, net | (21,909) | (27,770) | (44,683) | (56,476) |  |
Equity in earnings of unconsolidated subsidiaries | 0 | 0 | 0 | 0 |  |
Other (expense) income | 424 | 75 | 572 | 61 |  |
Income (loss) before income tax | (44,048) | (44,843) | (84,922) | (91,206) |  |
Income taxes | 12,213 | 5,967 | 23,614 | 15,617 |  |
Net income from continuing operations | (56,261) | (50,810) | (108,536) | (106,823) |  |
Assets: | 34,273 |  | 34,273 |  | 43,709 |
Metal Coatings | Operating Segments |  |  |  |  |  |
Operations and assets by segment |  |  |  |  |  |
Sales | 171,500 | 169,837 | 348,152 | 338,631 |  |
Cost of sales | 118,193 | 119,471 | 240,929 | 237,328 |  |
Gross margin | 53,307 | 50,366 | 107,223 | 101,303 |  |
Selling, general and administrative | 5,619 | 5,285 | 11,602 | 10,751 |  |
Operating income (loss) | 47,688 | 45,081 | 95,621 | 90,552 |  |
Interest expense, net | 0 | 0 | 0 | 0 |  |
Equity in earnings of unconsolidated subsidiaries | 0 | 0 | 0 | 0 |  |
Other (expense) income | (7) | 13 | 49 | (11) |  |
Income (loss) before income tax | 47,681 | 45,094 | 95,670 | 90,541 |  |
Assets: | 550,394 |  | 550,394 |  | 553,505 |
Precoat Metals | Operating Segments |  |  |  |  |  |
Operations and assets by segment |  |  |  |  |  |
Sales | 237,507 | 228,705 | 474,063 | 450,784 |  |
Cost of sales | 187,300 | 181,825 | 375,102 | 357,822 |  |
Gross margin | 50,207 | 46,880 | 98,961 | 92,962 |  |
Selling, general and administrative | 7,677 | 7,874 | 16,338 | 16,266 |  |
Operating income (loss) | 42,530 | 39,006 | 82,623 | 76,696 |  |
Interest expense, net | 0 | 0 | 0 | 0 |  |
Equity in earnings of unconsolidated subsidiaries | 0 | 0 | 0 | 0 |  |
Other (expense) income | 0 | 0 | 0 | 0 |  |
Income (loss) before income tax | 42,530 | 39,006 | 82,623 | 76,696 |  |
Assets: | 1,557,895 |  | 1,557,895 |  | 1,500,122 |
Infrastructure Solutions | Operating Segments |  |  |  |  |  |
Operations and assets by segment |  |  |  |  |  |
Sales | 0 | 0 | 0 | 0 |  |
Cost of sales | 0 | 0 | 0 | 0 |  |
Gross margin | 0 | 0 | 0 | 0 |  |
Selling, general and administrative | 9 | 5,932 | 38 | 5,954 |  |
Operating income (loss) | (9) | (5,932) | (38) | (5,954) |  |
Interest expense, net | 0 | 0 | 0 | 0 |  |
Equity in earnings of unconsolidated subsidiaries | 1,478 | 974 | 5,302 | 2,394 |  |
Other (expense) income | 0 | 0 | 0 | 0 |  |
Income (loss) before income tax | 1,469 | $ (4,958) | 5,264 | $ (3,560) |  |
Assets: | $ 97,768 |  | $ 97,768 |  | $ 98,169 |

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