There's no such thing as 'row chaining'. A row must fit onto a single page, the only exceptions being that data in varchar, nvarchar & varbinary columns can be partially or completely stored off-page (not good for performance though)
Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability