Graphical Construction Glossary >> Temporary Work. >> formwork >> Screw Jacks

Screw Jacks
Steel, course square threaded, fittings that fit into shoring systems or scaffold pipes to adjust the height and to distribute the load of the frames or scaffolding through large steel flat plates.

screw jacks


Simple fittings made out of solid steel they have a course, easily cleaned square thread suitable for load bearing. The plates are out of about 6mm steel 150mm square. The base plates have holes in them for nailing them to timber sole plates. The jacks are adjusted by hand with no load on them, and them a hammer is used to turn them if any load is on them.

At the right is a "U" jack that will easily allow a couple of 150 x 100 (6"x4") bearers to sit in it. The large wing nut sits on the pipe of the shore, while the main threaded part of the jack goes into the pipe. The manufacturers give recommendations for the the maximum extension allowed.

For non glossary articles of a general and how to nature go to the formwork section on this site.

If you didn't find exactly what you are looking for try this search tool that will search the site and the web.

"What can be added to the happiness of a man who is in health, out of debt, and has a clear conscience?
Adam Smith 1723-1790

"When we build, let us think that we build for ever."John Ruskin 1819-1900

coates hire
Hire Equipment
Furniture Fittings - Architectural Hardware - Electronic Locking Systems - Technical Hardware
BuilderBill sponsorship

BuilderBill Books

building maths
Building Maths

Stair Design
asbestos ebook
Asbestos Book

Calculator Pages.

Concrete yardage calculator

Reader's Questions.

Questions and answers.



Please Note! The information on this site is offered as a guide only!  When we are talking about areas where building regulations or safety regulations could exist,the information here could be wrong for your area.  It could be out of date!  Regulations breed faster than rabbits!
You must check your own local conditions.
Copyright © Bill Bradley 2007-2012. All rights reserved.
Page copy protected against web site content infringement by Copyscape