This study is aimed to discuss structural behavior of steel reinforced sandwich concrete beams (SWB) consisted of skins and a core. The skins were made of ordinary concrete and a core was of pumice lightweight concrete. The SWB skin compressive strengths of 30 MPa and the core compressive strength of 15 MPa were considered. Twelve SWB specimen of 150x250x2500 mm with 50 mm skin thickness and 150 mm core thickness were cast and tested after curing process under flexural points loading as simply supported beams. All the beams considered were reinforced with 3D12 mm deformed bar and 8 mm stirrups with 3 spacing variations. Shear span depth ratio (a/d) of 1.8, 2.3, 2.8, and 5.4 were also considered to reflect the behavior between short and slender beams. Results showed that the flexural behavior of sandwich beams were identical with normal or lightweight concrete beams behavior. Ultimate moment of beam section slightly increased with increasing the shear span to depth ratio, which were varies between 1.26 and 2.31 of the calculated moment. The yield moment to the ultimate moment ratio vary between 0.83 and 0.99. The ductility was increased with the decreased shear reinforcement spacing. The shear strength increased as the spacing of shear reinforcement decreases in almost all a/d variations. Shear strength was also increased with the increase of a/d ratio for short beam and the other hand shear strength decreased with the increasing a/d.

No abstract

This study aims to analyze the factors that cause delays and analyze the time and cost of the acceleration method with the addition of the number of workers and the addition of working hours to obtain a more efficient comparison of the acceleration method for project completion. As for the steps in this study, namely the collection of data in the form of questionnaire results and existing project data, including the Budget Plan (RAB), Analysis of Work Unit Prices (AHSP) and Time Schedule. Factors causing project delays based on questionnaires were analyzed using interest index calculations with validity and reliability testing, in order to obtain the top ranking of factors causing delays with a value of 𝑟ℎ = 0.502 < 𝑟𝑡 = 0.576 with "valid" test results caused by changes in material or material specifications. The results of the analysis of project plan conditions with a duration of 369 days, direct costs of Rp. 11,092,954,636.14 and an indirect cost of Rp. 2,160,276,709.31, and the results of the acceleration analysis with the addition of the number of workers (alternative 1) obtained a duration of 350 days with a direct cost of Rp. 11,092,954,636.14 and an indirect cost of Rp. 2,160,276,709.31, while the results of the acceleration analysis with the addition of working hours (alternative 2) obtained a duration of 364 days with a direct cost of Rp. 11,648,582,543.10 and an indirect cost of Rp. 1,604,648,802.35.

Rumah subsidi tergolong dalam Rumah Sangat Sederhana (RSS) yang dibangun di atas lahan yang relatif kecil dengan luas bangunan yang terbatas. Kondisi ini kerap kali mendorong penghuni untuk melakukan pengembangan dalam rangka memenuhi kebutuhan ruang. Sayangnya, pengembangan yang dilakukan seringkali masih jauh dari standar sehat dan nyaman. Perumahan Griya Pesona Alam yang terletak di Dasan Geria, Kecamatan Lingsar, Kabupaten Lombok Barat menjadi lokasi yang dipilih sebagai tempat pelaksanaan kegiatan pengabdian. Kegiatan pengabdian ini bertujuan untuk memberikan rekomendasi desain pengembangan rumah subsidi dengan tetap memperhatikan kaidah-kaidah perancangan arsitektural, beserta pemenuhan aspek kesehatan dan kenyamanan penghuni.  Secara umum, kegiatan pengabdian ini terbagi atas 3 (tiga) tahap utama, yaitu tahap penentuan masalah, tahap analisis pemecahan masalah, serta pelaksanaan penyuluhan. Keseluruhan tahapan tersebut meliputi survey dan observasi lapangan, studi pustaka dan kebijakan, desain bangunan, hingga penyuluhan kepada masyarakat. Penghuni wajib mempertimbangkan aspek pencahayaan, penghawaan, suhu udara dan kelembapan dalam ruangan dalam rangka menciptakan kesehatan dan kenyamanan dalam ruang. Lebih dari itu, ukuran minimal ruangan juga perlu dipertimbangkan agar kenyamanan spasial suatu ruang dapat tercapai. Keseluruhan aspek ini menjadi dasar maupun panduan dalam pengembangan desain rumah subsidi yang sehat dan nyaman bagi penghuni. Kaidah, teori, maupun panduan tersebut kemudian diterjemahkan ke dalam rekomendasi desain bangunan yang aplikatif. Pada pelaksanaanya, kegiatan penyuluhan tidak hanya berisi penyampaian materi, namun juga mencakup percontohan dan konsultasi desain kepada masyarakat perumahan. Kegiatan penyuluhan telah memberikan rekomendasi desain pengembangan dengan memperhatikan sirkulasi gerak, penghawaan, serta pencahayaan alami yang memadai sehingga diharapkan mampu meningkatkan pengetahuan dan kesadaran masyarakat.

Scheduling in the sense of a construction project is a tool to determine the activities needed to complete a project in a certain sequence and time frame, where each activity must be carried out so that the project is completed on time at an economical cost. In this study, the researcher evaluates the reasonableness of the contractor's schedule with the researcher's schedule from the Microsoft Project.This study was conducted to analyze the reasonableness of the contractor's schedule whether the contractor's schedule is in accordance with the reality on the ground. The data used in this study is secondary data in the form of working drawings and s curves. Analysis of this schedule using the Microsoft project application. Data analysis is carried out by making basic assumptions of building construction, creating a scope of work, making work durations, making relationships between jobs and then analyzing them in the Microsoft project application.The criteria for the fairness of the schedule are seen from the order of work, work items and work duration. The results showed that of the four contractor schedules at SDN 5 Sokong that met the fair criteria, only the CV UTAMA schedule