The SSCB is good for Bhs that have more than 500 nests. It is not recommended for newly built Bhs. It has been perceived wrongly by many newbies and those who are inexperience. I have seen many newly built swiftlet farms installed the SSCB and later complained that Swiftlets don't build nests in their Bhs. They are trying to imitate the Old successful farms that already had many nests.
Besides producing good clean and straight nests, The SSCB is to prevent Swiftlets to build nests at corners. This is for Bhs that want to maximise on producing 180 dg straight nests. The SSCB is of smooth surface therefore it is hard for the Swiftlets to build nests on its middle thus forcing them to build nests at the two lines between the wood and plate. With all the corners being covered with S.Steel plate the Swiftlets only could build nests on straight surface. Therefore it is not recommended for new Bhs.
Other advantages are the SSCB is cooler and easy harvesting. The nests could be easily removed during harvesting. Recommended for Bhs that's have high average temperature as the SSCB is cooler.
They come in 4x8 ft. Most Hardware shops are more than willing to order for you if they don't have stock.