Canopy steelwork - design rules?

[MPR]

I'm currently building a layout based on Torre Station on the Kingswear branch - see link below for details.

The next structure I need to assemble is the canopy in front of the goods shed

Torre goods shed canopy, just before it was demolished.

I have enough information to make the model externally correct, but don't know what pattern of steelwork was used. Does anyone have photos of the underside of this or a similar canopy, or know what pattern of trussing would have been employed? 

I have enough for the actual shed itself - I saw the contractors dismantle the original roof!

Last days of Torre goods shed before it was rebuilt as a Howdens depot.

Roof in course of demolition.

View of the interior during remodelling.

 

Thanks!

Martin

Edited April 14, 2019 by MPR

[johnofwessex]

Try the GWR Goods Services books by Tony Atkins, there are a few ;under the roof pictures, part 2B P232 has a view at Goodrington Bristol also features