Tip: Before cutting the services pipes into the formwork, use a laser level to check the RL of the pipe trench. If the pipes are in a trench which is too low or too high, it can be difficult or even impossible to cast the pipes into the formwork at the correct RL.

If the pipes are in fact at the wrong RL, and engineers are unable to approve a new depth, then the trench will have to be fixed.

There is no need however to check the RL of the pipe trench if the pipes are not already in the trench and all you have to do is cast some short pipes which will be joined up later.

Grout will leak from even the most tiny holes, so silicon sealer is used to secure the Grouting Formwork into position which prevents all leaks.

Mechanical Fitter Leigh (Hollywood) giving Admin LJ a few welding tips.

Leigh and LJ at Prominent Hill Mine

A nice collection of Prominent Hill photos by Zane Swart. This collection contains 506 photos of around the Prominent Hill Mine job, and other fun after work hours stuff. Start Slideshow

Zane and Yabbie at Prominent Hill

View Zane’s Prominent Hill photo collection.

Shane Chooking Yabbies

Thanks for that Zane

While the sump with ladder formwork was a pain in the neck to construct due to the fiddly ladder treads, it is always good to see that the job turned out pretty good.

Concrete Sump with Ladder

Concrete patchers will now come along and plug the z-bar holes.

Concrete poured into four tread stair formwork and the formwork has just been stripped by the formworkers. It looks like these stairs might need to be patched up in order to fill in all the air bubbles on the surface of the concrete, but other than that, a job well done.

Four Tread Concrete Stairs

Four concrete forms held together with Column-Clamps and held down with spaghetti nailed plywood. The 700 mm long bolts took a bit of work to cast in due to the extra reinforcement steel positioned exactly in the center of the pedestal.

Pedestal Formwork Ready For Concrete

This job was not as bad as the nightmare pedestal, but still took extra time because the formworkers had to reposition the steel in order to fit the bolts in.

Concretors Anthony and Nev Vibrating Pedestal Concrete

To ensure the correct heights, the concrete and bolt-top heights were established from a known benchmark with a Laser Level instrument and not by just measuring up from the foundation concrete.

Formworkers Ed and Rami at Prominent Hill Mine. 99% of the formwork construction jobs are now complete so Ed and Rami will fly-out today. A couple of formwork carpenters remain to do “shits and bits”, odd jobs etc.

Ed and Rami at Prominent Hill

Today, safety advisor Pothole is celebrating his birthday on the job at Prominent Hill Mine.

Happy birthday Pothole.

Pothole and Birthday Cake

This four tread stair formwork is held together with 4 z-bar bolts, held down with pins at the front and wedges (to the structure) at the back, and braced with one timber on each side and two timbers at the back.

Four Tread Stair Formwork

Four verticle plywood cleats were also added to the back corners to prevent the rear concrete form from blowing out.