The stroke width of U+23B7 RADICAL SYMBOL BOTTOM is wider than that of other radical symbol pieces, which are unified with the box drawing symbols U+2502 and U+250C according to L2/00-159. Here it is below U+2502.
U+23B7 does, however, have the same width as U+23AE INTEGRAL EXTENSION, which L2/00-159 lists as an alternative to U+2502, but I think using U+2502 is preferable, since U+2502 has the same stroke width as U+250C for the corner piece, for which L2/00-159 lists no alternative.
The stroke width of U+23B7 RADICAL SYMBOL BOTTOM is wider than that of other radical symbol pieces, which are unified with the box drawing symbols U+2502 and U+250C according to L2/00-159. Here it is below U+2502. U+23B7 does, however, have the same width as U+23AE INTEGRAL EXTENSION, which L2/00-159 lists as an alternative to U+2502, but I think using U+2502 is preferable, since U+2502 has the same stroke width as U+250C for the corner piece, for which L2/00-159 lists no alternative.