Types of Anchor Bolts

-
Date: 13 January 2011

Anchor Bolt - A fastener used to fastened an element to a base material.

To perform maintenance on existing structure can be very challenging as we do not have the freedom of space to work with. An anchor bolt for an equipment at my work place failed in tensile mode, causing increased in vibration reading of the equipment. To repair this, we have reached out to HILTI Malaysia, a specialist in anchoring.


There are 2 types of anchors: Cast-In Anchor and Post-Installed Anchor


Cast-In anchor is widely used on new construction, which is not an option for my repair work. It is not economically feasible to demolish most part of the concrete in order to cast in the anchor. Also, the time is a constraint. Thus, post-installed anchor is the best option. However, some calculations are required to ensure strength of anchor with overall loading.

Cast-In Anchor


Types of Cast-In Anchor:
1) Headed Bolt
2) L-Bolt
3) J-Bolt
4) Stud-welded plate.

Advantages
1) High loading capabilities
2) With design criteria

Disadvantages
1) Layout problems
2) Not flexible for fastened part adjustments (change in design)

Post-Installed Anchor


Types of Post-Installed Anchor:
1) Friction - Expansion anchor
2) Keying - Undercut anchor
3) Bonding - Chemical anchor
4) Combination of any 3 working principles.

Advantages
1) High loading capabilities (can  be designed as cast-in)
2) With design criteria (ETAG)
3) Flexible for layout adjsutments
4) Easy installation

Disadvantages
1) Less understood

Failure Modes



Source: Hilti Malaysia

Comments

Juli.Zakaria said…
nice one! if only i learnt this during ibrisam pnyer kelas,ceewwaahh
February 24, 2011 at 2:01 PM
Ju Zie said…
Wakaka! Oh Mr Ibrisam, pasti kecewa dpt student lagha mcm kite...
February 24, 2011 at 3:13 PM
Post a Comment

Popular posts from this blog

Bald Rock National Park, NSW

-
Image
Date : 3rd November 2013 Bald Rock is a 3-hours drive from Toowoomba and I have been thinking of visiting it since last year. But I was not sure if it was a suitable trip for an infant. However, it is the largest granite monolith in Australia, which means it is a must-go! So best buds, Julie Zac and Zayra came to visit on 1st November. Was not sure where to bring them around Toowoomba. Oh well, let's try hiking then! Sunscreen for everyone!: At first, I was thinking of bringing Kimi's stroller through the Bungoona Walk. The Summit Direct Walk would be out of the question. A lady who just got down advised that it was not a good idea... And thank God for that... (What was I thinking??!) We had a plate of fried rice each at the picnic table to fuel us with energy! The best thing was, my 2 year old son was just as excited as the adults. He wanted to walk (or run) on his own and made it to the top! After walking half way, the view started to become ver...
Read more

Crochet Headband

-
Image
Finally finished my first baby headband made using crochet. Took me forever but was amazed that I could actually do it. Haven't got a girl model so opt to use this boy model instead, hihi ;p This one is for baby Iman :) 
Read more

Book: Sushi for Beginners

-
Image
Date: 24 December 2010 Author: Marian Keyes She is definitely one of my favourite authors ever. The first book from her that I read was Under the Duvet, and the second was The Other Side of The Story - both I borrowed from UTM's library. She writes about characters with real life issues and manage to make the situation light although it's actually a dark topic. At the end of the day, readers will learn about complicated issues without feeling depressed. She delivers the message and adds humor to it - just brilliant! Plus, I learned a few Irish words! Sushi for Beginners is about the lives of 3 different ladies, all facing depressions. Different characters have a different coping mechanism. Synopsis: Lisa, a beautiful, career oriented lady is the b*tch boss from hell. She'll do whatever it takes to be the best at what she does, even if it means having no friends and family. The thing that drives her over the wall was when she actually sacrificed her marriage to ...
Read more