The following are the specifications for each standard size that is currently produced at Cor-Form. Additional information is available upon request regarding custom sizes and the specific details of any custom sizes.
Cor-Form, LLC Specifications
| Weight | Strap Length | Strap Width | Center Diameter | Sheet Metal Gauge | Sheet Metal Type | |
|---|---|---|---|---|---|---|
| 2″ Cor-Form | 1.25oz. | 3 1/2″ | 5/8″ | 1 7/8″ | 20 | Galvanized |
| 2.5″ Cor-Form | 1.5oz. | 3 1/2″ | 5/8″ | 2 3/8″ | 20 | Galvanized |
| 3″ Cor-Form | 2.6oz. | 3 1/2″ | 5/8″ | 2 7/8″ | 20 | Galvanized |
| 3.5″ Cor-Form | 2.9oz. | 3 1/2″ | 5/8″ | 3 3/8″ | 20 | Galvanized |
| 4” Cor-Form | 3.4oz. | 3 1/2″ | 5/8″ | 3 7/8″ | 20 | Galvanized |
| 4.5” Cor-Form | 3.9oz. | 3 1/2″ | 5/8″ | 4 3/8″ | 20 | Galvanized |
| 5” Cor-Form | 4.6oz. | 3 1/2″ | 5/8″ | 4 7/8″ | 20 | Galvanized |
| 5.5” Cor-Form | 5.2oz. | 3 1/2″ | 5/8″ | 5 3/8″ | 20 | Galvanized |
| 6” Cor-Form | 5.9oz. | 3 1/2″ | 5/8″ | 5 7/8″ | 20 | Galvanized |
| 8” Cor-Form | 9.5oz. | 3 1/2″ | 5/8″ | 7 7/8″ | 20 | Galvanized |
| 12″ Extension (4) | 14oz. | N/A | 5/8″ | N/A | 20 | Galvanized |
| 18″ Extension (4) | 20.3oz. | N/A | 5/8″ | N/A | 20 | Galvanized |
Further information can be found in the following four figures that show the Cor-Form device in multiple configurations. Sketches show the dimensions of all portions of the Cor-Form.
Figure 1 shows the basic pattern of the typical Cor-Form device.
Figure 2 & 3 shows how the Cor-Form device should be bent in order to install into a core hole. Please refer to the installation instructions for further explanation as to how this product is bent and installed.
Figure 4 shows a section of the Cor-Form device as installed in a concrete slab. The rod/rebar is a recommended practice as it will assist in the shear strength of the concrete infill. The fire caulk joint will serve two purposes and is also a recommended practice. First, it will help to assure that the assembly will meet fire code requirements once completed. Second, it will seal the gap between the concrete and the edge of the Cor-Form base. Sealing this gap will keep any infill product/fluid from flowing past the form and going to the floor below. In this example, we show using a concrete screw, there are multiple other types of anchors that will work in this application.
