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

Hello Second Baby!

-
Image
Kimi will be 3 soon and guess what, he is also a newly-appointed big brother! This time around, Prince Court is not in the picture - being full-time students, we can only afford to attend Toowoomba Base Hospital, a government hospital so this will be a whole new experience for me, not to mention being in a whole different country! A little park in front of the hospital: I had my monthly checkup at USQ clinic with Dr. Kay Brumpton, who is amazing by the way. And towards my second trimester, I had monthly visits to the hospital to see the midwives. This is the waiting area at the Antenatal Clinic: And that's Kimi climbing over the door of the play gym. Adventurous...! Being Asian, and smallish (even for an asian), my baby was measuring a bit small than the average Aussie. The doctor was a bit concerned and had me do 3 ultrasounds. Back in Malaysia, ultrasounds were performed during every single monthly check-up, but here, they feel that 1 is good enough, unless
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

Melbourne, Australia

-
Image
Melbourne Weekend Getaway! Date: 13 May 2011 It is not often you hear someone say, "I'm going to Australia just for the weekend". However, it actually happened to me, not intentionally, but accidentally... I booked my flight ticket (in August 2010 for the lowest fare possible!!) without double checking and ended up with only 2 full days to spend in Melbourne. To make the best of it, I pre-booked full day tours for both days... which left out any opportunity for Melbourne city sight-seeing - how sad! From LCCT, KLIA to Melbourne Airport, it took about 8 hours flight - which I can't sleep for most part of it!! - and the time difference is plus 2 hours from Malaysia. Date: 14 May 2011 Upon arrival...   Hi Mr Sean/Chin! We were greated by Ms Candy who showed us to our maxi taxi. The driver was Mr Sean/Chin (didn't quite get his name) who was from Cancun, China. He was friendly and energetic. He dropped us of at Punthill - The Stanton at St Kild
Read more