Model Stair Stringers in Tekla

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  I have found this the  best way. It’s very similar to the way I would do it in 2D cad. Should anybody have a requirement for any stair parts ie treads, stringers, handrailing etc. please give me a call  and I’ll get you a quote.

1) Draw in grids as shown plus on plan for outside of stringers.
2) Set x.y.z to their standard direction. Pick FLT10*200 set ends offset to -200 100 and right, front, front,
On elevation draw in flat from point A to B. Move stringer up by 12 mm
3) Check position in plan. I like to put the stringers on the inside of the grid lines.
4) Trim top of stringer back 10 mm with vertical cut line.
5) Apply con 103 fin plate to top. Remember you have to play about to get it flush
with top of pfc. Put fin plate to inside of stringer. Line cut stringer flush with top of pfc.
6) Cut 2 planes with line cut at base. Insert flat bar column. Do a con.1042 to put base on flat column.
Explode base con. Remove column and weld plate to stringer. No need to do this Tekla have just advised
that con 1038 will do this ie put a base plate on stringer.
7) Mirror stringer with base plate to other grid line. One can now draw in the treads.
8) Next I intend to draw in one 65×6 flat bar end, cut chamfer & bolt group to stringer.
9) draw in front 30×5 nosing. Call this the main part by welding 65×6 end plate to it.
10) Make this into Custom Component – Detail so I can use on any job. Export to firm folder.
11) I’ll explode then mirror 65×6 to other stringer. Adjust length of nosing flat and copy backwards.
12) The nosing flat wouldn’t attach to custom component. As the size and length changes it can be put
in for each job. uel no. is g3.uel and it’s in my firm folder after I exported it. After you click export
it goes to the current model folder and one has type in g3.


The above sketch is taken from drawing ACW_01 Vietnam job. Treads are 275 mm wide 30×5 flat pitched at 33.75 mm.


Open Treads from plain plate, durbar and perforated plate

Go to profile catalogue>others pick BLZ insert these values BLZ280*100*5 this is assuming plate is 5 mm thick.
Once this is positioned correctly between stringers apply connection 116 with 50*50*6 rsa to both sides of tread.
Make sure the RSA Is symmetrical about centre of 280 mm size. Put a bit of transparency to the plate if it’s
perforated. Go to elevation on stringer and make sure the view depths catch both stringers. Copy treads with
end angles by going, riser and number of treads. Put a note on GA and detail drawings to say it’s perforated or
durbar and the job is done. The screenshot is not quite correct as the leg depth of the front and back should be the same on the instruction above.

Spiral Stair

Used Tekla connections con 19 & 21 for spiral section on above stairs. It was a compete waste of time it doesn’t do anything to produce the detail drawings. I’ve done all other jobs in 2d autocad. JOB CAL.75 Dance Studio Calder Fabrications.


For a centre chs spline Spiral Stair job Go to Wilson of Lanark Job. Wil.11-01, 02 & 03. Done for Hogg of Carluke. Note treads are out-rigged via a bolted tube collar. Handrails spirally rolled. This job was done is Cad 2d.  Tekla SPIRAL STAIR no. is S68


6 Flight stair for Calder Fabrications JOB CAL.91

Tread detail 5 mm pressing. 50x50x6 rsa welded to flat bar stringers. Note countersunk headed bolts for flush to face to suit carpet type finish. I had to play about to get the countersink to show up. Ended up with the bolt settings as follows bolt standard 8.8CSK   Cut length 106  bolt distance X 170    POSITION middle 0.00  front 0.00 middle 64.63  

a simple two flight stair for Townhill Welding. Main contractor Balfour Beattie. Alterations to Royal Infirmary Glasgow. JOB TOW.08

Another imported .dwg tread which is bolted to stringer via 50x50x6 rsa’s Durbar plate treads.

Another job for Calder fabs. A block of flats in Camlon Falkirk. PFC Stringers. job CAL.86
Pan treads. PFC stringers. Bolt heads covered with concrete infil. 40X40X5 RSA. Cleats welded to treads.
Weldon Engineering Grid Stairs for water treatment access areas. Job WEL.24-322
25 x 5 grid. End plates 65x6. Rear flat can be increased in height for anti-slip through feature. 200x10 flat stringers. Holes for handrailing are detailed.
JOB MIL_02 Miller Construction Overtown
job MIL_02 Welded in pan treads
CVR Carmichael job no CVR_48 Invergorden
stringers 200x90 pfc 50x50x6 rsa cleats. job CVR_48
job CVR-39 Balfour Beattie Airdrie high School
10 mm pan tread. 300x10 flat stringers. JOB CVR-39 dwg profile for tread.
CV Carmichael for St Andrews Uni job CVR-28 Note the macro for the handrail post bases I think it's 28. existing columns.
Deep grid tread with rear anti-slip through plate 260x75 pfc stringers CVR-28 JOB
NANDO'S ST ENNOCK'S CENTRE job ABW-01 existing columns
JOB ABW-01 FLAT BAR STRINGERS I have just noted that the above holes were slotted on what looks like the inside of the tread
KNO-01 Greigs St Ennock's Centre. Knox of Hamilton
Pan treads Greigs KNO-01
CVR-6 SPIRAL Gibson Laing Lauriston street Edinburgh

For a centre chs spline Spiral Stair job Go to Wilson of Lanark Job. Wil.11-01, 02 & 03. Done for Hogg of Carluke. Note treads are out-rigged via a bolted tube collar. Handrails spirally rolled. Tekla SPIRAL STAIR no. is S68

150 PFC Stringers inset from outside of treads CVR-6 TAPER PLATES Welded to treads
Job COA-18 Coatbridge Engineering
Job COA-18

for more stair design info go to