moisture content of timber floor joists

Free Download PDF - Branz

29 Oct 2010 4 Drying – allowing any remaining moisture to be removed by drying as a result of air movement behind the cladding. . gives these moisture contents for timber framing at ceiling battens, rafters and floor joists. 4 Insert the 

Analysis of Joist Masonry Moisture Content Monitoring - Building

2 Oct 2015 Joist moisture content Measurements: Unheated Wing First floor 34. 4.5 .. at beam ends (right) 1. Figure 2. Overview of apartment complex (left); preretrofit joist ends in concrete masonry unit.

Residential Housing: Wood Moisture Content - Carolina Inspection

homeowner of readings from a wood moisture meter. The wood moisture content (WMC) of wooden members of the substructure of residences being sold rotten floor joist, sills, and subflooring. often this is the “too late” level of reading for 

timber floors pre-installation assessment - Garde Timber

This data sheet outlines aspects that should be considered prior to the installation of a timber floor. It includes If the moisture content of the timber flooring is close to the average in-service moisture content then subsequent seasonal changes in humidity joists in a house that is open underneath, particularly when built on.

Review of In-Service Moisture and Temperature Condistions in

measured values of wood moisture content and temperature are tabulated. Trends are . rim joists, and floor joists near the exterior. It should be noted that the When bottom plates are in direct contact with concrete slab foundations (no 

Moisture content - Swedish Wood

If the wood's moisture content is higher than the equilibrium moisture content, the wood will dry out and if it is lower the wood . floor joists and structural timber, for example, become more dimensionally stable if evenly stressed wood is used.

Moisture in timber - Wood Components

content of a piece of timber increases, its electrical resistance decreases and vice versa. Subject: timber – general. Revised: December 2011. Figure 1: Cupping in a timber floor caused by a differential in moisture content between upper and 

BA-1508: Analysis of Joist Masonry Moisture Content Monitoring

19 Oct 2015 moisture content & relative humidity were monitored at joist ends in historic mass brick masonry walls retrofitted .. The first-floor framing (sawn lumber) was grouted in place and embedded in the concrete masonry unit wall 

Planning for shrinkage in framing lumber - Fine Homebuilding

14 May 2014 My guess is that the humps in your floor have to do with the moisture content of the lumber you installed. In the old days, floors were framed completely with dimensional lumber, and joists and beams likely came from the same 

Moisture in Timber - Hyne Timber

An understanding of the way in which moisture in timber affects in-service performance is important as it equation is used to determine the moisture content of timber:- . such as hardwood floor joists, figures relating to the shrinkage from.

measuring the moisture content of timber - Hyne Timber

Checking the moisture content of timber prior to installation is important for many applications, including flooring, decking and lining, and to ensure that subsequent movement (shrinkage and swelling) remains within accepted bounds. This data .. softwood floor over hardwood joists). The presence of salts (either from salt 

Pre-installation Requirements - The Australian Timber Flooring

the appropriate moisture content at the time of installation and therefore flooring products must be protected from weather exposure . Special precautions must be taken when timber floors are laid on joists in a house that is open underneath, 

Timber as a structural material - an introduction - Confederation of

The use of timber as a structural material is not new, in fact dating back many centuries. . appropriate installation moisture content of timber sections above 75mm IStructE Technical Guidance Note 18 (Level 1) Design of timber floor joists.

Wood Moisture Content - RLC Engineering

The moisture content of wooden substructure members is routinely being disclosed in the closing process of real estate transactions. Substructures with WMC in this range may show decay or rot in floor joist, sills, and subflooring. Repair is 

Moisture and Wood-Frame Buildings Moisture and Wood-Frame

party walls, and. S-P-F floor joist. • New generation engineered wood products, includ- ing laminated veneer lumber, ing of factors that influence the moisture content of wood and third floor of a wood-frame building, a 1” wide sealant.

how to take moisture content readings - CHH Woodproducts

moisture content readings. 1. The only appropriate moisture meter to be used on site is the. 'sliding hammer' type which ceiling battens and floor joists. 6. read and record the moisture content percentage of each individual piece of timber.

timber floors pre-installation assessment - Hyne Timber

This data sheet outlines aspects that should be considered prior to the installation of a timber floor. It includes If the moisture content of the timber flooring is close to the average in-service moisture content then subsequent seasonal changes in humidity joists in a house that is open underneath, particularly when built on.

The impact of long-term loading and changes in moisture content

as local authorities — is deflection in timber purlins and beams. timber's performance paper looks at the effects that loading and changes in moisture content and relative The beam or bressummer is normally made up of three floor joists.

Dealing with timber in leaky buildings[PDF 838 KB]

The work that is needed to remediate decayed timber in leaky buildings will differ from building to building, . of mould is a sign of high humidity which can be caused by poor or inadequate heating and ventilation or . With timber members that are difficult to replace such as floor joists running back into a building, it may be 

Conducting a Site Survey - Wood Flooring UK

Cross flow ventilation below suspended ground floor joists should allow vent openings to equal 1.5% of the crawl The aim of acclimatising wood flooring is to allow the moisture content of the timber to adjust to the normal expected day to 


35% is used (3750 p. s. i.) (25,875 kN/m2). The above adjustment for moisture content applies only to lumber. 4 in. One thousand 2 X 6 Douglas Fir joists 12 ft (3. .. floor joists factor, where the tension factor is governed by the knots.

Moisture-related wood movement - Swedish Wood

For floorboards, internal cladding and floor joists, the target moisture content should be 8, 12 and 16 percent respectively to minimise swelling or shrinkage, see diagram 15 under moisture content, and the relevant product standard.

timber floors recommended installation practices - Hyne Timber

engineered timber joists (it does not include steel joists), structural sub-floors such as plywood, particleboard content of sub-floor framing timbers, which can generally tolerate greater fluctuations in moisture content, than timber floors. The.

Understanding Moisture Content and Wood Movement

3 Sep 2010 Most finish carpenters are aware that seasonal changes in humidity cause trim and flooring to shrink in the .. above the kitchen ceiling and under the shower floor which the timbers and joist was treated but brown stains kept 

Wood Handbook--Chapter 12--Drying And Control - Conrad Lumber

Recommended moisture content 12–3. timbers 12–3. Lumber 12–3. Glued Wood Products 12–3. Drying of Wood 12–5. Air Drying .. For example, in an ordinary dwelling having about 60 floor joists, at least 10 tests should be made on joists.