Bower Beam & Joist Repair - The Simple Way RepairBower beams are the simple solution to joist and beam end repair. Any joist or beam end in direct contact with a wet wall will eventually succumb to fungal attack and decay (rot) and lose its strength. It may even break. If this happens, replacement is expensive and time consuming. Any joist or beam end in direct contact with a wet wall will, eventually, succumb to fungal attack and decay (rot), thus loosing its strength and it may even break. Should this happen, the problem of replacement was expensive and time consuming. The BOWER BEAM, manufactured in 2mm KHR steel to BS4360 by Hill and Smith Ltd and protected by their SUPAGALV finish, in excess of BS2989, can be used to effect a quick, cheap and easy but secure and long lasting replacement.