User:Gaharper/sandbox

Article Evaluation: Trusses (due Nov. 8, 2018)

Wikipedia's article on this topic was written in a very neutral tone, presenting a substantial amount of information that was both exceptionally informative and clear in its layout. In terms of critiques of the article, I would suggest that more information be added regarding the historical development of the truss system. This could help to further contextualize the topic for the reader and present a more well rounded source of information overall. All links within the article worked properly, and sent me to more unbiased sources of information that assisted in my understanding of the topic. The page received a "B" rating, with the editorial explanation listed as lacking in engineering topics related to trusses, but excelling in other content. This page differed from our discussions in class in that it went into more detail regarding the different types of trusses, with supplemental images. This is most likely a result of class time constraints. Overall, I thought this article was well composed and informative.

Asphalt Roll Roofing Additions: (due Nov. 15, 2018)

Two citations were added regarding the history of the material, as well as to the installation process section:

Supplemental information regarding the installation of asphalt roll roofing

Supplemental information regarding the history of asphalt roll roofing

Supplemental information regarding the pros and cons of using asphalt roll roofing

Asphalt Roofing Manufacturing Association

Draft Outline: (due Nov. 20, 2018)

- Improve historical narrative presented of the material

- Clearly lay out pros and cons of the material usage

- Clarify the installation process

- Clarify as needed the information of the specific types of asphalt roofing and their applications, adding images as necessary

Forming Additional Comments: (due Nov. 28, 2018)

Asphalt roll roofing's development as a material: The asphalt-prepared roofing industry had its beginning in Sweden more than a century ago, when roof boards were covered with paper treated with wood tar. Later, in Germany, paper was coated with varnish, surfaced with finely ground mineral matter, and used as a roofing material. In the United States, asphalt was used to waterproof duck fabric in the early part of the nineteenth century. The first recorded use of melted asphalt for impregnating duck fabric in this country was in 1844. About this time roofs composed of sheets of sheathing paper treated with pine tar and pine pitch, and surfaced with fine sand, were being laid. Coal tar and coal- tar pitch were later substituted for the pine tar.These were the forerunners of the present asphalt and coal-tar-pitch built-up roofs.It is not known definitely when felt was first substituted for sheathing paper or when asphalt was first used as the impregnating agent, but it is known that the first asphalt-prepared roofing, that is, roofing manufactured ready to apply, was marketed in 1893. The first roofing were unsurfaced.

Mineral-surfaced, asphalt-prepared roofing appeared in 1897. The first asphalt shingles, mineral-surfaced, were made in 1901, and about this time slate grainless were first used as a surfacing material. Asphalt shingles did not come into general use until about 1911. During 1939, thirty-two manufacturers, representing about 95 percent of the asphalt-prepared roofing industry, produced 34,225,187 squares ^ of prepared roofing. Almost one third of this, 11,173,856 squares, was in the form of asphalt shingles, which are used principally for roofing dwellings. The shingles produced in 1939 were sufficient to cover more than 1,000,000 dwellings, assuming an average size of 10 squares per roof. In two surveys of roofing materials in 20 Eastern States,- made during 1938, the kinds of roofing materials on 20,841 dwellings along 4,038 miles of highway were tabulated. Of these dwellings, 6,549 were roofed with asphalt shingles and 2,381 with asphalt roll roofing. Thus almost 43 percent of these dwelling were roofed with asphalt-prepared roofing. Statistics of the Bureau of the Census indicate that asphalt-prepared roll roofing and shingles constituted slightly less than half of all the roofing materials sold during 1937.

Pros of using asphalt roll roofing:

-Cost, roll roofing is a cheap material

-Availability

-Fire resistant material (to a minor degree)

-Can be used for waterproofing

-Can be applied with relative else

Cons of using roll roofing:

-Not long lasting - will require maintenance though to varying degrees based on the environment where the material is applied

Steep Slope Products:

-Strip Shingles: about three times as long as they are wide. Manufactured in both standard and metric dimensions, strip shingles are distinguished by the number of cutouts or tabs they have. The most common type of strip shingle is the “three-tab” shingle. You can achieve different textural and lighting/shadowing effects with strip shingles depending on the number, shape and alignment of the cutouts.

-Laminated Shingles: contain more than one layer of tabs to create extra thickness. They are also called three-dimensional or architectural shingles because they give your roof the visual depth and beauty of a custom look. It’s no surprise laminated shingles are a favorite among builders, roofing contractors and home-buyers.

-Interlocking Shingles: designed to mechanically fasten to each other, and are used to provide greater wind resistance. They come in various shapes and sizes providing you with a wide range of design possibilities.

-Large Individual Shingles: generally rectangular or hexagonal in shape, and do not use cutouts or tabs.

Low Slope Products:

-Modified Bitumen Sheets: Modified bitumen sheets are composed primarily of polymer modified bitumen reinforced with one or more plies of fabric such as polyester, glass fiber or a combination of both. Assembled in factories using high quality control standards, modified bitumen sheets are made to have uniform thickness and are manufactured to have consistent physical properties throughout the sheet.

The finished roofing membrane may consist of one or more modified bitumen sheets, or may be comprised of a combination of built-up roofing (BUR) felts and one or more modified bitumen sheets. The type of substrate and the performance objectives influence the specification of the modified bitumen membrane system.

Asphalt used in manufacturing modified bitumen systems is generally modified with one of two modifiers: Atactic Polypropylene (APP) or Styrene Butadiene Styrene (SBS). These modifiers create a uniform matrix that enhances the physical properties of the asphalt.

-Built Up Roofing (BUR): Built-Up Roofing (BUR) consists of multiple layers of bitumen alternated with ply sheets (felts) applied over the roof deck, vapor retarder, and (most often) insulation.

BUR roofing systems are particularly advantageous for flat or low-sloped applications. The heart of the system is the membrane which includes the layers of bitumen, which is applied hot, and the reinforcing plies of roofing felt.

With today’s technological advances in asphalt science, cold bitumen adhesives can be used in lieu of hot asphalt.

BUR roofing systems have had a long-standing popularity, due in large part to the success and proven reliability of BUR. The stock of 20, 30 and 40-year-old BUR roofs still in excellent condition attests to this fact.

nkyoder review of gaharper's draft Exceedingly thorough, though citations are needed when things ultimately get posted to the final article. The edits seem neutral and flow nicely, and they are obviously relevant and needed in the original article. NKyoder (talk) 03:05, 29 November 2018 (UTC)