UtakataNoAnnex
Senior Member
Yeah...that doesn't look like it would take to sharp corners too well. >.<
Toronto Ontario Line: King-Bathurst Station | ?m | ?s | Metrolinx | HDR
- Thread starter interchange42
- Start date
AHK
Senior Member
July 9.
South Side of King Street:
North Side of King Street:
South Side of King Street:
North Side of King Street:
AHK
Senior Member
AHK
Senior Member
July 16 - Structural steel for the temporary work shelter building is going up. (The 'temporary work shelter' is a bit of tongue in cheek - looks more robust and structurally sound than some permanent construction at a few other sites....)
AlvinofDiaspar
Moderator
UtakataNoAnnex
Senior Member
Temporary here I presume means it will not be part of the project when completed.
AHK
Senior Member
July 17 - Work on the temporary structure continues to move quickly. Another load of steel beams was being delivered this morning, during ongoing installation of the beams from the prior delivery. On the other side of the site, the foundations for the south wall of the temporary structure are all complete, with the base plates ready, with bolts and their nuts waiting for the columns to be mounted.
Red Mars
Senior Member
Jul 18, 2024
AHK
Senior Member
AHK
Senior Member
July 19. A day of very impressive progress on the north side of Queen Street. This morning, the crew was working on the final, east-most section of the north wall steel girder structure (photos above). This afternoon, when we passed by around 4:30 PM, what looks to be almost the entire south side (King Street frontage) steel girder structure had been erected.
rdaner
Senior Member
Taken 22 July.
AHK
Senior Member
July 24: North side of King Street - Some infill sections have been added into the steel framework on both the south and north side structures. Additional steel girders have been delivered and are staged on the ground - some have a slight curve to them - will be interesting to see how they are positioned when they are installed.
South Side of King Street:
South Side of King Street:
Attachments
peter.d
New Member
The girders are not actually permanently curved, just not properly supported horizontally on the ground.
When installed vertically this afternoon they were perfectly straight.
When installed vertically this afternoon they were perfectly straight.
AHK
Senior Member
With all due respect, while I am not a construction of engineering person, from my perspective:
1. The curved girders were not installed yesterday - they were still sitting on the ground this morning.
2. There is no way structural steel 'I' or 'H' beams, with substantial flanges along each side, will (in my humble opinion) curve due to lack of proper support. These girders were designed for structural rigidity. If they had curved after fabrication, there would be signs of buckling or rippling in the flanges along the concave sides of the girders - none visible. The only way these girders would bend like this is when they are being formed and still hot after being forged (or possibly being reheated).
North side photos - Girders are now up on the west side of the site, and a photo of the curved beams still resting on the ground. South site photos (below): Concrete pad being poured south-east corner for the dump truck exit onto Stewart Street - in preparation for the start of excavation activities.
FastidiousHack
New Member
Beams often come pre-curved (camber) so that when they are installed, they deflect into straightness - most horizontal members are designed this way.
While designed not to buckle once installed, long members can absolutely deflect prior to installation. There are people who spend their entire career designing the temporary support systems for transporting structural members, such as bridge girders, so that they do not get damaged prior to erection. Another thing to note is that these very long slender components will often have additional supports once installed to prevent buckling, which are not present prior to installation.
Last edited: