Hawke’s range of transit frames, for both welding and bolting, meet the various requirements of offshore and marine applications. HS is the most common frame type. HSF frames are for less accurate holes cut in decks and bulkheads. HSR is a frame for use in high-stress areas. The HSK frame allows installations in positions where the transit needs to elevate above possible contamination. Hawke has frames for both casting into the structure and mounting in lightweight wall constructions. Frames are also available for use in EMC and Explosion applications. The Hawke HSBTB (Back-To-Back) frame is a combination of two regular HS frames with a spacing distance in between. The total depth of the frame is 200mm. This frame type is used as an extra level of protection, such as in H class fire rated environments, or when tightness after installation should be verified by adding over pressure in the cavity in between the different frames.