... . It's 1.3/4" thick (the slab, not the drawing). REA. Or 1.7/8" thick. GWR, as shown on drawing. M.S.= mild steel. regards, Martin. posted: 10 Jan 2018 00:31 from: Andrew Barrowman Great! Looks like the bolts are always perpendicular to the center-line of the crossing. Thanks Martin. posted: 10 Jan 2018 13:27 from: David R 7mm scale BC7 slab and brackets are available from Off The Rails :100_100825_460000000.jpg posted: 10 Jan 2018 15:52 from: Andrew Barrowman The bolts are perpendicular to the wing rails on that version. Interesting! posted: 10 Jan 2018 16:09 from: Martin Wynne Andrew Barrowman wrote: The bolts are perpendicular to the wing rails on that version. Interesting! Hi Andy, ??? There is a single through bolt, with spacers between the wing rails and the vee nose (not shown in David's drawing). So unless you have invented a bolt with a bend in the ...