Bamboo scrimber is a sustainable engineered material that overcomes natural round bamboo’s various weaknesses. This study compared the bamboo scrimber’s mechanical (strength, stiffness, and ductility) to timber. The results showed physical properties are comparable, even superior, wood, especially in compression. Scrimber has higher density than Its drier equilibrium moisture content indicates more hydrophobic timbers. maximum crushing strength (σc//), compressive stress...

Round bamboo culms offer excellent sustainable materials for a green building construction. are tied or fastened into multi-culm composite member to resist the heavier load. Circles externally touching each other can well model composite's section. This study aimed obtain formulas drawing cross-section of composite, calculating its section properties, and then embedding them graphing calculator spreadsheet. As many as nine full-sized single columns were tested in laboratory buckling load...

The population of South Jakarta, a city within the Province Jakarta Capital Region, is increasing annually, and development land into building causes termite diversity loss. aim this research was to determine subterranean species their distribution in evaluate soil profile habitat. This study conducted carried out at four residential areas representing randomly selected sub-districts. Specimens were collected with baiting system. At each residence, as many 25-30 stakes pine wood (Pinus...

Cross-laminated timber (CLT) has become a popular engineered wood product due to its innovative properties and rapid development, which involves the use of various species adhesives. This study aimed assess effect glue application on bonding strength, delamination, failure CLT made from jabon bonded with cold-setting melamine-based adhesive at three different rates: 250, 280, 300 g/m2. The was composed melamine–formaldehyde (MF) by adding 5% citric acid, 3% polymeric 4,4-methylene diphenyl...

A tree may receive compression and flexure combination, the structural analysis governed by building code be capable of estimating tree’s safety in built environment. This study proposed to refer check dimension adequacy resisting load. simplified case focusing only on self-weight ignoring external loads; therefore, buckling a slender tapered round column subjected is advocated. Buckling occurs when structure can no longer maintain its original shape. Euler Ylinen’s stress (Method 1)...

Buckling resistance study is necessary because buckling often a critical factor in column design. This aims to predict the experimental formulas fit Gigantochloa apus bamboo's reduction (ψ) equations. In total, 235 G. bamboo samples (102 short, 69 intermediate, and 64 long culms) were tested by axial compression. A column's load-bearing capacity less than short of phenomenon. The data curve-fitted regression analyses, using simplified Rankine–Gordon, Newlin-Gahagan, Euler-Johnson formula....

Background and Objective: One of the external factor which influence survival termites is temperature.Termites try to maintain temperature inside nest within a certain range in order survive.The objective this research analyze nests subterranean termite Coptotermes curvignathus.Methodology: This study was conducted at Termite Rearing Unit, Faculty Forestry, Bogor Agricultural University.Temperature C. curvignathus indoor laboratory were simultaneously measured using thermocouples.Data...

Relatively little information is available regarding the correlation between wood and veneer quality, especially for Samama wood, an endemic species in eastern Indonesia. This study addresses quality of 8 years old its effect on quality. was determined by evaluating specific gravity, moisture content, fiber dimensions, microfibril angle from pith toward bark. Meanwhile, assessed examining thickness lathe check characteristics. Geometry factor model constructed to elaborate quantities Results...

Abstract This experiment studied five species of bamboo culms [e.g. B. vulgaris (ampel), D. asper (betung), G. apus (tali), atroviolacea (hitam), and pseudoarundinaceae (andong)], then analyzed the possibility to develop cross-species structural grading (both strength capacity grading) models by mean dummy variable regression. Since regression analysis resulted significantly different coefficient values variables, any coincided trendline did not found, but some parallel ones were obtained....

The beam stability factor (CL) is applied in construction practices to adjust the reference bending design value (Fb) of sawn lumber consider lateral-torsional buckling. Bending tests were carried out on 272 specimens four wood species, namely, red meranti (Shorea sp.), mahogany (Swietenia pine (Pinus and agathis (Agathis analyze a simply supported subjected concentrated loads at several points. empirical CL ratio modulus rupture (SR) specimen average SR standard-size specimens. non-linear...

Bambu merupakan salah satu hasil hutan multiguna yaitu sebagai bahan baku mebel, kerajinan, alat musik, dan konstruksi. Besarnya kekuatan tekan tarik bambu sudah dimanfaatkan dalam desain konstruksi, namun masih terbatas, seperti untuk kolom atau penguat beton. Penelitian ini bertujuan menentukan sifat mekanis betung (Dendrocalamus asper Backer ex K.Heyne,) umur empat tahun, sejajar serat, tegak lurus serta nilai 5% batas bawah. Ukuran contoh uji pengujian mengacu pada ISO 22157-2019....

Similar with other construction materials, wood strength is decreasing when applied by long term loading. Wooden cooling tower structure at Star Energy Geothermal (Wayang Windu) Ltd was built in 1998 and it should be evaluated to avoid sudden structural failure. Evaluation conducted through several steps: species identification, the physical mechanical properties testing, estimation for remaining service-lifetime generating mathematical models derived from creep test reduction of cross...

The surface roughness and wettability of wood are critical aspects to consider when producing laminated products with adhesive applications. This study aims investigate the dynamic Jabon in presence melamine formaldehyde (MF)-based adhesives. Commercial MF adhesives (MF-0) modified (MF-1) were applied wood, which includes tangential (T), radial (R), semi-radial (T/R) surfaces. was assessed using a portable stylus-type profilometer. low-bond axisymmetric drop shape analysis (LB-ADSA) method...