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Produktionsmetod för korslimmat trä i flerbostadshus

Tillgren, Ludvig LU (2024) In 0349-4969 VBEM01 20241
Construction Management
Abstract (Swedish)
Syfte
Studiens syfte är att finna utvecklingspotential i dagens produktionsmetod med betong- och kors laminerat-trästommar (KL-trästommar), genom att undersöka bygg- och produktionsmetoderna. Målet är att förbättra dessa metoder så att byggbranschen utvecklas ekonomiskt och minskar klimatpåverkan.

Metod
För att besvara frågeställningarna har studien använt sig av metoderna litteraturstudie och fallstudie. Under litteraturstudien har fakta inom området samlats som leder upp till själva fallstudien. Fallstudien består av triangulering av observations-, dokument- och intervjustudie. Observationsstudien bestod av deltagande under montage av KL-trästomme. Under dokumentstudien undersöktes produktionsdokument som senare var underlag... (More)
Syfte
Studiens syfte är att finna utvecklingspotential i dagens produktionsmetod med betong- och kors laminerat-trästommar (KL-trästommar), genom att undersöka bygg- och produktionsmetoderna. Målet är att förbättra dessa metoder så att byggbranschen utvecklas ekonomiskt och minskar klimatpåverkan.

Metod
För att besvara frågeställningarna har studien använt sig av metoderna litteraturstudie och fallstudie. Under litteraturstudien har fakta inom området samlats som leder upp till själva fallstudien. Fallstudien består av triangulering av observations-, dokument- och intervjustudie. Observationsstudien bestod av deltagande under montage av KL-trästomme. Under dokumentstudien undersöktes produktionsdokument som senare var underlag tillsammans med observationsstudien för intervjustudien. Resultaten studerades och analyserades för att besvara frågeställningarna.

Slutsats
Produktionsdokument varierade inte så mycket mellan de olika stommaterialen. Störst skillnad i dokumenten var i tidsplanen där KL-trästommen byggdes markant fortare än betongstommen. Funktionskraven var högre för KL-trästommen som medförde mer arbete och var kostnadsdrivande i produktionen. Arbetsmiljön under KL-trämontaget var bättre än under betongmontaget. Byggmetoden för KL-trästommar gick både smidigt och snabbt. Den lätta stommen underlättade både under leveransen av materialet samt under montaget. Utmaningarna var att fästa stomelement där massor av infästningar skulle göras, där vissa var svårare än andra. Fukt var även i fokus under montaget där vatten inte fick bli stående och de tejpade varje öppning för få tätbyggnad. Utvecklingspotentialen för betong är att göra det mer miljövänligt utan reducera kvalitén och det ekonomiska fördelarna. Detta har utvecklats idag som EKO-betong och utvecklas än. KL-trästommar behöver reducera dess kostnad. Det finns metoder för att uppfylla de högre funktionskraven men allt är kostnadsdrivande, utöver att materialet redan är dyrt. Med ökad erfarenhet med KL-trä i byggbranschen skulle detta kunna möjliggöras. (Less)
Abstract
Purpose
The purpose of this study is to identify potential improvements within the current construction management processes associated with concrete and cross-laminated timber (CLT) frames. This is to be completed by examining the construction and production methods used when working with the materials. The goal is to improve these methods so that the construction industry develops economically and reduces its environmental impact.

Method
To answer the research questions, the study has utilized both a literature study and case study. The literature study analyses current knowledge about the field, this information was then used as a base for the case study. The case study consisted of a triangulation of observational, document, and... (More)
Purpose
The purpose of this study is to identify potential improvements within the current construction management processes associated with concrete and cross-laminated timber (CLT) frames. This is to be completed by examining the construction and production methods used when working with the materials. The goal is to improve these methods so that the construction industry develops economically and reduces its environmental impact.

Method
To answer the research questions, the study has utilized both a literature study and case study. The literature study analyses current knowledge about the field, this information was then used as a base for the case study. The case study consisted of a triangulation of observational, document, and interview studies. The observational study consisted of participation during the assembly of a CLT frame. The document study investigated relevant production documents. The documents and earlier observational study were then used to formulate questions for the interview study. The results of the literature and case studies were then interpreted and analyzed to answer the initial research questions.

Conclusion
A comparison of production documents for CLT and concrete revealed that documents did not vary greatly between the different frame materials. The most significant difference in the documents was in the schedule where the CLT frame was built significantly faster than the concrete frame. Another notable difference was that functional requirements were higher for the CLT frame. This entailed more manual labor and monetary input during the assembly of the material in comparison to concrete. Additionally, the working environment during the assembly of CLT was better than that during concrete assembly.
Construction completed with CLT frames was both smooth and efficient. The light frame simplified the construction process during both the delivery of material and during its assembly. Challenges presented themselves when attaching CLT frames to one another, this as many screws were required in the process with some being more difficult to insert than others. Avoiding moisture damage was also a key focus during construction, precautions were taken to ensure that no leakage could affect the material during the construction process. Currently CLT production is more ecofriendly than working with concrete. However, to become an accessible material in the construction industry the cost of CLT frames needs to be reduced. There are methods to meet the higher functional requirements of the material but these processes once again require additional costs. As the construction industry gains experience working with CLT, functional costs may be reduced making building with the material more accessible. The developmental potential for concrete lies in making the material more environmentally friendly in a way that does not reduce the quality and the economic benefits of the material. Currently a product known as ECO concrete is being developed to fit these criteria. (Less)
Please use this url to cite or link to this publication:
author
Tillgren, Ludvig LU
supervisor
organization
alternative title
Construction methods for cross-laminated timber in apartment buildings
course
VBEM01 20241
year
type
H3 - Professional qualifications (4 Years - )
subject
keywords
Korslimmat trä, KL-trä, betong, stommaterial, byggproduktion, byggmetoder, flerbostadshus, cross-laminated timber, CLT, concrete, frame material, construction management, construction methods, apartment buildings
publication/series
0349-4969
report number
5715
other publication id
ISRN LUTVDG/TVBP-24/5715-SE
language
Swedish
additional info
Handledare: Rikard Sundling
Examinator: Stefan Olander
id
9161696
date added to LUP
2024-06-12 14:11:25
date last changed
2024-06-12 14:11:25
@misc{9161696,
  abstract     = {{Purpose
The purpose of this study is to identify potential improvements within the current construction management processes associated with concrete and cross-laminated timber (CLT) frames. This is to be completed by examining the construction and production methods used when working with the materials. The goal is to improve these methods so that the construction industry develops economically and reduces its environmental impact.

Method
To answer the research questions, the study has utilized both a literature study and case study. The literature study analyses current knowledge about the field, this information was then used as a base for the case study. The case study consisted of a triangulation of observational, document, and interview studies. The observational study consisted of participation during the assembly of a CLT frame. The document study investigated relevant production documents. The documents and earlier observational study were then used to formulate questions for the interview study. The results of the literature and case studies were then interpreted and analyzed to answer the initial research questions.

Conclusion
A comparison of production documents for CLT and concrete revealed that documents did not vary greatly between the different frame materials. The most significant difference in the documents was in the schedule where the CLT frame was built significantly faster than the concrete frame. Another notable difference was that functional requirements were higher for the CLT frame. This entailed more manual labor and monetary input during the assembly of the material in comparison to concrete. Additionally, the working environment during the assembly of CLT was better than that during concrete assembly.
Construction completed with CLT frames was both smooth and efficient. The light frame simplified the construction process during both the delivery of material and during its assembly. Challenges presented themselves when attaching CLT frames to one another, this as many screws were required in the process with some being more difficult to insert than others. Avoiding moisture damage was also a key focus during construction, precautions were taken to ensure that no leakage could affect the material during the construction process. Currently CLT production is more ecofriendly than working with concrete. However, to become an accessible material in the construction industry the cost of CLT frames needs to be reduced. There are methods to meet the higher functional requirements of the material but these processes once again require additional costs. As the construction industry gains experience working with CLT, functional costs may be reduced making building with the material more accessible. The developmental potential for concrete lies in making the material more environmentally friendly in a way that does not reduce the quality and the economic benefits of the material. Currently a product known as ECO concrete is being developed to fit these criteria.}},
  author       = {{Tillgren, Ludvig}},
  language     = {{swe}},
  note         = {{Student Paper}},
  series       = {{0349-4969}},
  title        = {{Produktionsmetod för korslimmat trä i flerbostadshus}},
  year         = {{2024}},
}