Ceilings or Overheads

The following installation guide is provided to answer frequently asked questions regarding the assembly of PROMARINE® fire protection ceilings or overheads.

B15 RATED CEILING

This example is based on a B15 rated ceiling, using 16mm thick PROMARINE®-450, bonded both sides with .030" or 0.8mm thick high pressure laminates. Maximum panel dimension is 471/2" x 951/2" or 1206mm x 2425mm. Prior to the installation of PROMARINE®-450 ‘B15’ ceiling and, indeed, the ordering of the materials, the orientation of the ceiling grid must be decided. Several factors must be taken into account, i.e. panel wastage, accessibility etc. Consultation with the Marine Department prior to this decision is available.

Detail 1 - Ceiling Perimeter Channel

Prior to the fitting of ceiling perimeter channels (PC-30-T), existing wall panels must be marked with the required ceiling height. Ceiling perimeter channels are then cut to the required length and attached to the existing wall panels using 1/2" or 12.7mm long screws. At corners, ceiling perimeter channels can either be mitered or cut square.

Detail 2 - Adjustable Hanger Assembly

Adjustable hanger assemblies (HA-40) should be installed at 48" or 1220mm maximum centers. The adjustable hanger assembly is attached to the hanger angle (H300) with two self tapping screws and should be lightly secured to allow movement. Hanger angles are produced to suit the void space dimension, i.e. H300 for up to 9" or 228mm void spaces, and are either welded or bolted to the overhead stiffeners. As the adjustable hanger assembly can accommodate discrepancies of at least 1" or 25mm in any direction, the positioning of the hanger angle does not require to be exact. The hanger bracket should also be left loose at this stage.

Detail 3 - Main Channels

The main channels (PC-40-U) are supported between the ceiling perimeter channels and the adjustable hanger assemblies using three way (CB-3-40) and/or four way connector joints (CB-4-40) together with the hanger bracket as shown. Center main channels should be installed first. After cutting to the required length, connector joints should be attached at either end. This is achieved by folding the upright legs onto the channel with standard pliers. Main channel is then loosely attached to the adjustable hanger assembly using the M6 spindle bolt provided. Each end of the channel can now be secured to the ceiling perimeter channel and/or other main channels as required, using the same process mentioned above. If the span is longer than 96" or 2440mm, two main channels can be joined together with a CB-2-40 straight connector. Again, the upright legs are simply folded into position using pliers.

Detail 4 - Single Omegas

Single omegas (RJ-28-S) are used to support the ceiling panels by clamping them to the main channels. After cutting to required length, omegas should be lightly attached to main channels with screws. All main channel and adjustable hanger assembly screws and bolts should now be securely tightened.

Detail 5 - Ceiling Panel Installation

Ceiling panels can now be trimmed to required dimensions and installed into the ceiling grid, commencing from one side of the room. The loose fitting omegas should allow panels to be slotted into position. However, use of ‘C’ clamps is recommended to support one end of each panel while installing the adjacent panel. The perimeter of the ceiling is supported by attaching internal angles (PA-30-B) to the existing wall panels. All omega screws should now be securely tightened.

Detail 6 - Cover Strips

The system is complete when the cover strips are introduced to ‘hide’ profiles. Omegas are concealed with PV-03 or PV-04 cover strips, or highlighted with a PS-24 insert. Internal angles can be covered with a PV-05 cover strip. All cover strips are simply pushed into position.