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B8.3.8 Front Bracing Members (FBM) Front bracing members must join the RHO, the SIM and the LFS (Fig. RC5). The upper Front Bracing Members (FBMUP) must join points C on the RHO to the SIM at or behind points SF. The lower Front Bracing Members (FBMLOW) must join points AF to points SF. The FBM must be continuous tubes. The angle between the FBMUP and the vertical must be less than or equal to 45 degrees. FBMup Clarification of Rule B8.3.8: FBMlow SIM Per 8.3.1 - The minor angle between the two ends of a not-straight tube must not exceed 30° FBMlow Cannot exceed 30 degrees to continue as FBMlow If you have a ‘nose’ car and the FBMup has a bend/weld angle that exceeds 30 degrees, you will need a FBMlow