Characterisation and grading of two selected timber species grown in Kwara State Nigeria

Jimoh, A.A.; Aina, Samuel Tomi

doi:10.4314/njt.v36i4.2

Cited by 5 publications

(2 citation statements)

References 12 publications

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“…Timber, which is also wood is a versatile, flexible, and complex building material for constructing houses, companies, and insulating material and it is quite abundant in Nigeria [45][46]. There is an increase in the request for timber which is unlimited in Nigeria.…”

Section: As a Construction Or Landscaping Materialsmentioning

confidence: 99%

Some underutilized indigenous timber trees with high medicinal values: Its challenges and prospects

Bf¹,

Ao²,

To³

et al. 2021

World J. Adv. Res. Rev.

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Underutilized species is referred to species to which little or no attention is paid by the policymakers, agricultural researchers, and plant breeders. Medicinal plants used in traditional medicine have a natural origin, are effective, and less expensive. Traditional doctors in African countries make use of plants in treating millions of people. Albizia zygia, Alstonia boonei, Tetrapleura tetraptera, Newbouldia laevis and Canarium schweinfurthii are the underutilized indigenous timber trees with high medicinal value that were discussed. Different parts of these trees like the bark, root, leaves, flower, stem, gum are used as medication in treating diverse diseases such as painful urination, epilepsy, convulsion etc. This study aims at reviewing the underutilized indigenous timber trees with high medicinal values, their challenges, and prospects. Methods are derived to increase the value chain of underutilized timber trees which can contribute to the livelihoods of smallholder farmers and other stakeholders mainly through income generation.

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Section: As a Construction Or Landscaping Materialsmentioning

confidence: 99%

Some underutilized indigenous timber trees with high medicinal values: Its challenges and prospects

Bf¹,

Ao²,

To³

et al. 2021

World J. Adv. Res. Rev.

View full text Add to dashboard Cite

show abstract

“…According to the European structural timber strength classification system (EN 338 2009), Ceiba pentandra, Vitex doniana and Pseudocedrela kotschyi were assigned to strength class C16, D30 and D35 respectively (Jimoh and Ibitolu, 2018). While Azadirachta indica was graded into strength class D40 and Xylopia aethiopica was graded into strength class D70 in accordance with BS 5268 (Jimoh and Aina, 2017).…”

Section: Introductionmentioning

confidence: 99%

Reliability-Based Investigation on the Compressive Strength of Commonly Used Nigerian Timber Species

U.N.

A.A²,

J.O³

et al. 2022

MJCE

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This paper considers the compressive strength both parallel and perpendicular to grain of not less than twenty Nigerian-grown timber species out of which, six commonly used ones were selected and their compressive resistance assessed under certain loads. First, it was found out that the basic compressive stress perpendicular to the grain of timber is about 22% of the basic compressive stress parallel to grain. A reliability assessment was then carried out using the First Order Reliability Method (FORM) to investigate the performance of a column section of 250 x 250mm and 300 x 300mm for the six Nigerian-grown timber species. Lophira alata was found to be the most reliable with a Probability of failure Pf = 2.78 x 10-3 and 7.1 x 10-2 under an axial load of 1000kN and 2000kN respectively. This was followed by Anogeissus leiocarpus with Pf = 2.53 x 10-2 and 5.26 x 10-3 under an axial load of 1000kN and 1500kN respectively. Others that followed were ‘Iroko’(Chlorophora excelsa),‘Abura’ (Mitragyna ciliata),‘Afara’ (Terminalia superba), and ‘Obeche’(Triplochiton scleroxylon), in the order of descending performance. It can been established from this study that, ‘Ekki’ (Lophira alata) and African birch (Anogeissus leiocarpus) could be suitable for bridge piles and piers, railways or related structures that require compressive members with high axial capacity whereas, ‘Abura’, ‘Obeche’, ‘Afara’ and ‘Abura’ would be best suitable for buildings.

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Azadirachta indica A. Juss. a multi-purpose tree as a leading species in carbon stocking in two Sahelian cities of Niger

et al. 2021

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Characterisation and grading of two selected timber species grown in Kwara State Nigeria

Cited by 5 publications

References 12 publications

Some underutilized indigenous timber trees with high medicinal values: Its challenges and prospects

Some underutilized indigenous timber trees with high medicinal values: Its challenges and prospects

Reliability-Based Investigation on the Compressive Strength of Commonly Used Nigerian Timber Species

Azadirachta indica A. Juss. a multi-purpose tree as a leading species in carbon stocking in two Sahelian cities of Niger

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