+%%%%%% tabular (platex/#43) \@tabclassz
+\def\ltj@sharp{\ltjfakeboxbdd\ignorespaces\@sharp\unskip\ltjfakeboxbdd}
+\def\@tabclassz{%
+ \ifcase\@lastchclass
+ \@acolampacol
+ \or
+ \@ampacol
+ \or
+ \or
+ \or
+ \@addamp
+ \or
+ \@acolampacol
+ \or
+ \@firstampfalse\@acol
+ \fi
+ \edef\@preamble{%
+ \@preamble{%
+ \ifcase\@chnum
+ \hfil\ltj@sharp\hfil
+ \or
+ \hskip1sp\ltj@sharp\hfil
+ \or
+ \hfil\hskip1sp\ltj@sharp
+ \fi}}}
+\patchcmd\@classv{%
+ \ignorespaces\@sharp
+}{%
+ \everypar\expandafter{\the\everypar\ltjfakeboxbdd}\ignorespaces\@sharp\unskip
+}{}{}
+
+%%%%%% tabbing (platex/#53)
+\patchcmd\@startline{\strut}{\strut\inhibitglue}{}{}
+\def\ltj@unhbox@curfield{\ltjfakeboxbdd\unhbox\@curfield\ltjfakeboxbdd}
+%\patchcmd\@contfield{\unhbox\@curfield}{\ltj@unhbox@curfield}{}{}
+\patchcmd\@addfield{\unhbox\@curfield}{\ltj@unhbox@curfield}{}{}
+\pretocmd\@stopfield{\inhibitglue}{}{}