jack post
C1/C2Technical/Construction/DIY
Definition
Meaning
A temporary, adjustable vertical support used in construction to hold up beams or ceilings during building or renovation.
An adjustable metal or wooden post with a screw mechanism, used for temporarily supporting structural loads; by extension, any robust, temporary support mechanism in engineering contexts.
Linguistics
Semantic Notes
A compound noun, 'jack' refers to the mechanical lifting/supporting device, and 'post' to its columnar form. It is a tool, not a permanent structural element.
Dialectal Variation
British vs American Usage
Differences
The term is standard in both varieties, though regional synonyms like 'acrow prop' (UK, a brand name) or 'adjustable shore' (US) might be used interchangeably in professional contexts.
Connotations
Technical, practical; no significant difference in connotation.
Frequency
Slightly higher frequency in American English due to prevalence of DIY culture; in UK English, the proprietary term 'Acrow prop' is very common.
Vocabulary
Collocations
Grammar
Valency Patterns
install/place/set up a jack post under [OBJECT]support [OBJECT] with a jack postuse a jack post to [VERB]Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “[No common idioms directly featuring this term]”
Usage
Context Usage
Business
Rare, except in construction industry procurement or project management discussions.
Academic
Used in civil engineering, architecture, and construction technology texts.
Everyday
Used primarily by DIY enthusiasts, homeowners, or tradespeople discussing home renovations.
Technical
Core term in construction manuals, safety guidelines, and structural engineering for temporary shoring.
Examples
By Part of Speech
verb
British English
- We need to jack-post the ceiling joist before removing the wall.
- They jack-posted the beam securely.
American English
- We'll jack post the header while we replace the studs.
- Make sure to properly jack-post that load.
adverb
British English
- [Not used as an adverb]
American English
- [Not used as an adverb]
adjective
British English
- [Rare as adjective] The jack-post support system was installed.
American English
- [Rare as adjective] Ensure you have jack-post hardware ready.
Examples
By CEFR Level
- [This term is too technical for A2 level.]
- The builder used a strong metal jack post to hold the beam.
- Before demolishing the internal wall, we had to install two adjustable jack posts to support the ceiling.
- Safety regulations require a jack post to be placed on a solid base plate.
- The structural engineer specified the load capacity and positioning for the screw jack posts during the underpinning process.
- Temporary shoring with multiple jack posts allowed for the seamless replacement of the compromised girder.
Learning
Memory Aids
Mnemonic
Imagine 'Jack' (as in the children's toy that jumps up) lifting up a fence POST. A 'jack post' is a post that 'jacks' things up.
Conceptual Metaphor
SUPPORT IS A LIFT; A STRUCTURE IS A BURDEN.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not translate literally as 'почтовый Джек'.
- Avoid confusion with 'jackpot' or 'jack post' as a name.
- The term is a technical compound, not related to 'jack' as a person.
Common Mistakes
- Misspelling as 'jackpost' (sometimes accepted but usually two words).
- Using it to refer to a permanent structural column.
- Confusing with 'jack' for lifting cars.
Practice
Quiz
In which context would you most likely encounter a 'jack post'?
FAQ
Frequently Asked Questions
No. While both use a screw or hydraulic mechanism to lift, a car jack is for vehicles and is portable. A jack post is a vertical column designed for long-term temporary support of building structures.
No, it is designed as a temporary shoring device. Permanent supports must be engineered and installed according to building codes.
An Acrow prop is a specific, widely known brand of adjustable steel jack post. In many regions, especially the UK, 'Acrow prop' is used generically to mean any jack post.
Typically, a jack post has a screw mechanism or pin-and-hole system that allows you to extend or retract the inner tube to the desired height and lock it in place.