Show Us Your Rooftop Elements!!!

Roofers roofing rooftop on the raised roof of the old MTH Car Barn converted to a Enginehouse.

Not rooftop, but building detail parts for buildings in prototype development. Fire escapes with two different floor grate styles. Alternate fire escape styles to follow.

If these are to be offered in kits, how many levels would you want?

  There realy isnt too much up top but hvac. And large loose items can pose a danger to  roof membranes, so most are pretty "clean" today. It's pretty consistent other than specialty equipment; like maybe an elevator shed? Even refridgeration would be hvac. But..... catwalks, ladders, vent pipe, water drain debris covers, rocks, birds, rubber, antenna arrays, huge bees nests, electric panels, hvac, occasional solar for hot water or electric, skylight windows, capped holes for hvac, maybe an access hatch or three, or a doorway (if your lucky. that or the tall ladders are unloaded )   

Discarded- Stray tools, and pipe, an old lunch, chain, paint rollers thick with tar, a few buckets, two baseballs, a rickity ladder left behind, a good one locked up to plumbing, an old hvac door (set on the buckets; the lunch table ), a few bottles or flat big gulp cups (usually throw up by idjits or blown up by wind if old and flat), a long rope, and rare anymore, but loved "add on", a tiny beam hoist to swing over a side for block&tackle;..  

Maybe a chiller/ cooling tower

Or external ductwork ( note the saftey ladder's 'cage'?)

You might have 20 of these .....maybe a mix of brands too.

Fewer of these, but note the wall to the right below.   A rooftop item both decorative (faces front, blocks the ground view of "unsightly" rooftop equipment), and functional (aids in dirt and wind protection ensuring consistant running equipment in the foulest weather).  Sometimes it is a wall, sometimes just a fabric "porch awning" set NEXT TO the equipment. From the ground you just see a "crown" on the building's top vs a bunch of brown and grey metal boxes spoiling the aesthetic view of the buidling.

If separate, down angled vent pieces can be swapped around to create variations on units. Combos and odd work too.

On the toy end, and though crude, note the features I chose to mimick; Billboard & wind screen blocking the street view of the "hvac unit"; large vent/ air evacuation fan, large mushroom vent, and a conical roof drain debris screen. (hvac courtesy of tyco; an ho "ground level billboad" whistle box)

Doug,  Ameri-Towne has roof top water tanks.  Or the same effect can be accomplished with HO water tanks.  Billboards work. John in Lansing, ILL 

Doug, as you are most definitely aware, different rooftop items for different types of buildings.  Having grown up in a 5 story walk-up apartment building in the Bronx, the roof top had an access structure atop the stair case to permit roof access through a door instead of a ladder to a hatch, probably 10' square, a skylight atop the staircase to provide daytime lighting in the staircase, vent pipes for the sanitary systems in the building, one for each column of bathrooms in the building, TV antennae, remember them?, cloths lines for upper floor tenants' laundry and off course the over the side ladders for those fire escapes you're going to make.  By the way 3-6 levels on the fire escapes should be good. Maybe 3 story with add-on kits for expansion.  Not sure if some of the taller structures, York Hotel would have had fire escapes for that many floors.

Commercial and industrial buildings would need appropriate HVAC systems for climate control, refrigeration, mechanical ventilators, exhaust stacks, vent pipes, skylights, mechanical room for elevator, water tank(s), possible duct work.  Maybe even a flag pole or helipad for hospitals or very tall headquarters type office buildings.