Renfroe Model SEA is a clamp used primarily for erection of structural beams.
Configuration of the lower hook assembly and the over center position of the shackle permits a clamp to grip closer to the beam web, stabilizing the load and holding it with the web near horizontal for easy alignment of bolt holes. The clamp incorporates a “Lock Open” and “Lock Closed” feature which facilitates in attaching and removing the clamp from the beam.
| Rated Capacity ( Tons ) | Jaw Opening A ( in. ) | Flange Width B ( in. ) | C ( in. ) | MAX. D ( in. ) | E ( in. ) | F ( in. ) | G ( in. ) | Weight ( lbs. ) |
| 1 | 0-3⁄4 | 3-8 | 11 5⁄16 | 17 1⁄8 | 1 1⁄8 | 9 1⁄4 | 5 7⁄8 | 22 |
| 2 | 0-1 | 5-12 | 17 1⁄2 | 21 1⁄2 | 1 1⁄2 | 14 1⁄8 | 6 7⁄8 | 73 |
| 4 | 0-1 | 7-14 | 19 3⁄4 | 27 1⁄2 | 1 3⁄4 | 17 7⁄8 | 8 11⁄16 | 116 |
| 4 | 3⁄4-1 3⁄4 | 7-14 | 20 1⁄2 | 28 1⁄4 | 1 3⁄4 | 17 7⁄8 | 8 11⁄16 | 120 |
| 8 | 0-1 1⁄2 | 10-20 | 25 1⁄2 | 31 | 2 | 21 1⁄2 | 9 3⁄4 | 200 |
| 8 | 1-2 1⁄2 | 10-20 | 26 1⁄2 | 32 | 2 | 21 1⁄2 | 9 3⁄4 | 204 |
| 15 | 3⁄4-2 1⁄4 | 10-20 | 31 | 41 1⁄2 | 3 3⁄4 | 21 1⁄2 | 10 3⁄4 | 343 |
| 15 | 2-3 1⁄2 | 10-20 | 32 1⁄4 | 42 3⁄4 | 3 3⁄4 | 21 1⁄2 | 10 3⁄4 | 343 |
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